/*!
 * FullCalendar v1.6.4
 * Docs & License: http://arshaw.com/fullcalendar/
 * (c) 2013 Adam Shaw
 */

/*
 * Use fullcalendar.css for basic styling.
 * For event drag & drop, requires jQuery UI draggable.
 * For event resizing, requires jQuery UI resizable.
 */

(function($, undefined) {

    ;;

    var defaults = {

        // display
        defaultView: 'month',
        aspectRatio: 1.35,
        header: {
            left: 'title',
            center: '',
            right: 'today prev,next'
        },
        weekends: true,
        weekNumbers: false,
        weekNumberCalculation: 'iso',
        weekNumberTitle: 'W',

        // editing
        //editable: false,
        //disableDragging: false,
        //disableResizing: false,

        allDayDefault: true,
        ignoreTimezone: true,

        // event ajax
        lazyFetching: true,
        startParam: 'start',
        endParam: 'end',

        // time formats
        titleFormat: {
            month: 'yyyy年-MMMM月',
            week: "MMM d[ yyyy]{ '&#8212;'[ MMM] d yyyy}",
            day: 'dddd, MMM d, yyyy'
        },
        columnFormat: {
            month: 'ddd',
            week: 'ddd M/d',
            day: 'dddd M/d'
        },
        timeFormat: { // for event elements
            '': 'h(:mm)t' // default
        },

        // locale
        isRTL: false,
        firstDay: 0,
        monthNames: ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12'],
        monthNamesShort: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec'],
        dayNames: ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'],
        dayNamesShort: ['周日', '周一', '周二', '周三', '周四', '周五', '周六'],
        buttonText: {
            prev: "<span class='fc-text-arrow'>&lsaquo;</span>",
            next: "<span class='fc-text-arrow'>&rsaquo;</span>",
            prevYear: "<span class='fc-text-arrow'>&laquo;</span>",
            nextYear: "<span class='fc-text-arrow'>&raquo;</span>",
            today: '今天',
            month: 'month',
            week: 'week',
            day: 'day'
        },

        // jquery-ui theming
        theme: false,
        buttonIcons: {
            prev: 'circle-triangle-w',
            next: 'circle-triangle-e'
        },

        //selectable: false,
        unselectAuto: true,

        dropAccept: '*',

        handleWindowResize: true

    };

    // right-to-left defaults
    var rtlDefaults = {
        header: {
            left: 'next,prev today',
            center: '',
            right: 'title'
        },
        buttonText: {
            prev: "<span class='fc-text-arrow'>&rsaquo;</span>",
            next: "<span class='fc-text-arrow'>&lsaquo;</span>",
            prevYear: "<span class='fc-text-arrow'>&raquo;</span>",
            nextYear: "<span class='fc-text-arrow'>&laquo;</span>"
        },
        buttonIcons: {
            prev: 'circle-triangle-e',
            next: 'circle-triangle-w'
        }
    };

    ;;

    var fc = $.fullCalendar = {
        version: "1.6.4"
    };
    var fcViews = fc.views = {};

    $.fn.fullCalendar = function(options) {

        // method calling
        if(typeof options == 'string') {
            var args = Array.prototype.slice.call(arguments, 1);
            var res;
            this.each(function() {
                var calendar = $.data(this, 'fullCalendar');
                if(calendar && $.isFunction(calendar[options])) {
                    var r = calendar[options].apply(calendar, args);
                    if(res === undefined) {
                        res = r;
                    }
                    if(options == 'destroy') {
                        $.removeData(this, 'fullCalendar');
                    }
                }
            });
            if(res !== undefined) {
                return res;
            }
            return this;
        }

        options = options || {};

        // would like to have this logic in EventManager, but needs to happen before options are recursively extended
        var eventSources = options.eventSources || [];
        delete options.eventSources;
        if(options.events) {
            eventSources.push(options.events);
            delete options.events;
        }

        options = $.extend(true, {},
            defaults,
            (options.isRTL || options.isRTL === undefined && defaults.isRTL) ? rtlDefaults : {},
            options
        );

        this.each(function(i, _element) {
            var element = $(_element);
            var calendar = new Calendar(element, options, eventSources);
            element.data('fullCalendar', calendar); // TODO: look into memory leak implications
            calendar.render();
        });

        return this;

    };

    // function for adding/overriding defaults
    function setDefaults(d) {
        $.extend(true, defaults, d);
    }

    ;;

    function Calendar(element, options, eventSources) {
        var t = this;

        // exports
        t.options = options;
        t.render = render;
        t.destroy = destroy;
        t.refetchEvents = refetchEvents;
        t.reportEvents = reportEvents;
        t.reportEventChange = reportEventChange;
        t.rerenderEvents = rerenderEvents;
        t.changeView = changeView;
        t.select = select;
        t.unselect = unselect;
        t.prev = prev;
        t.next = next;
        t.prevYear = prevYear;
        t.nextYear = nextYear;
        t.today = today;
        t.gotoDate = gotoDate;
        t.incrementDate = incrementDate;
        t.formatDate = function(format, date) {
            return formatDate(format, date, options)
        };
        t.formatDates = function(format, date1, date2) {
            return formatDates(format, date1, date2, options)
        };
        t.getDate = getDate;
        t.getView = getView;
        t.option = option;
        t.trigger = trigger;

        // imports
        EventManager.call(t, options, eventSources);
        var isFetchNeeded = t.isFetchNeeded;
        var fetchEvents = t.fetchEvents;

        // locals
        var _element = element[0];
        var header;
        var headerElement;
        var content;
        var tm; // for making theme classes
        var currentView;
        var elementOuterWidth;
        var suggestedViewHeight;
        var resizeUID = 0;
        var ignoreWindowResize = 0;
        var date = new Date();
        var events = [];
        var _dragElement;

        /* Main Rendering
		-----------------------------------------------------------------------------*/

        setYMD(date, options.year, options.month, options.date);

        function render(inc) {
            if(!content) {
                initialRender();
            } else if(elementVisible()) {
                // mainly for the public API
                calcSize();
                _renderView(inc);
            }
        }

        function initialRender() {
            tm = options.theme ? 'ui' : 'fc';
            element.addClass('fc');
            if(options.isRTL) {
                element.addClass('fc-rtl');
            } else {
                element.addClass('fc-ltr');
            }
            if(options.theme) {
                element.addClass('ui-widget');
            }

            content = $("<div class='fc-content' style='position:relative'/>")
                .prependTo(element);

            header = new Header(t, options);
            headerElement = header.render();
            if(headerElement) {
                element.prepend(headerElement);
            }

            changeView(options.defaultView);

            if(options.handleWindowResize) {
                $(window).resize(windowResize);
            }

            // needed for IE in a 0x0 iframe, b/c when it is resized, never triggers a windowResize
            if(!bodyVisible()) {
                lateRender();
            }
        }

        // called when we know the calendar couldn't be rendered when it was initialized,
        // but we think it's ready now
        function lateRender() {
            setTimeout(function() { // IE7 needs this so dimensions are calculated correctly
                if(!currentView.start && bodyVisible()) { // !currentView.start makes sure this never happens more than once
                    renderView();
                }
            }, 0);
        }

        function destroy() {

            if(currentView) {
                trigger('viewDestroy', currentView, currentView, currentView.element);
                currentView.triggerEventDestroy();
            }

            $(window).unbind('resize', windowResize);

            header.destroy();
            content.remove();
            element.removeClass('fc fc-rtl ui-widget');
        }

        function elementVisible() {
            return element.is(':visible');
        }

        function bodyVisible() {
            return $('body').is(':visible');
        }

        /* View Rendering
		-----------------------------------------------------------------------------*/

        function changeView(newViewName) {
            if(!currentView || newViewName != currentView.name) {
                _changeView(newViewName);
            }
        }

        function _changeView(newViewName) {
            ignoreWindowResize++;

            if(currentView) {
                trigger('viewDestroy', currentView, currentView, currentView.element);
                unselect();
                currentView.triggerEventDestroy(); // trigger 'eventDestroy' for each event
                freezeContentHeight();
                currentView.element.remove();
                header.deactivateButton(currentView.name);
            }

            header.activateButton(newViewName);

            currentView = new fcViews[newViewName](
                $("<div class='fc-view fc-view-" + newViewName + "' style='position:relative'/>")
                    .appendTo(content),
                t // the calendar object
            );

            renderView();
            unfreezeContentHeight();

            ignoreWindowResize--;
        }

        function renderView(inc) {
            if(!currentView.start || // never rendered before
                inc || date < currentView.start || date >= currentView.end // or new date range
            ) {
                if(elementVisible()) {
                    _renderView(inc);
                }
            }
        }

        function _renderView(inc) { // assumes elementVisible
            ignoreWindowResize++;

            if(currentView.start) { // already been rendered?
                trigger('viewDestroy', currentView, currentView, currentView.element);
                unselect();
                clearEvents();
            }

            freezeContentHeight();
            currentView.render(date, inc || 0); // the view's render method ONLY renders the skeleton, nothing else
            setSize();
            unfreezeContentHeight();
            (currentView.afterRender || noop)();

            updateTitle();
            updateTodayButton();

            trigger('viewRender', currentView, currentView, currentView.element);
            currentView.trigger('viewDisplay', _element); // deprecated

            ignoreWindowResize--;

            getAndRenderEvents();
        }

        /* Resizing
		-----------------------------------------------------------------------------*/

        function updateSize() {
            if(elementVisible()) {
                unselect();
                clearEvents();
                calcSize();
                setSize();
                renderEvents();
            }
        }

        function calcSize() { // assumes elementVisible
            if(options.contentHeight) {
                suggestedViewHeight = options.contentHeight;
            } else if(options.height) {
                suggestedViewHeight = options.height - (headerElement ? headerElement.height() : 0) - vsides(content);
            } else {
                suggestedViewHeight = Math.round(content.width() / Math.max(options.aspectRatio, .5));
            }
        }

        function setSize() { // assumes elementVisible

            if(suggestedViewHeight === undefined) {
                calcSize(); // for first time
                // NOTE: we don't want to recalculate on every renderView because
                // it could result in oscillating heights due to scrollbars.
            }

            ignoreWindowResize++;
            currentView.setHeight(suggestedViewHeight);
            currentView.setWidth(content.width());
            ignoreWindowResize--;

            elementOuterWidth = element.outerWidth();
        }

        function windowResize() {
            if(!ignoreWindowResize) {
                if(currentView.start) { // view has already been rendered
                    var uid = ++resizeUID;
                    setTimeout(function() { // add a delay
                        if(uid == resizeUID && !ignoreWindowResize && elementVisible()) {
                            if(elementOuterWidth != (elementOuterWidth = element.outerWidth())) {
                                ignoreWindowResize++; // in case the windowResize callback changes the height
                                updateSize();
                                currentView.trigger('windowResize', _element);
                                ignoreWindowResize--;
                            }
                        }
                    }, 200);
                } else {
                    // calendar must have been initialized in a 0x0 iframe that has just been resized
                    lateRender();
                }
            }
        }

        /* Event Fetching/Rendering
		-----------------------------------------------------------------------------*/
        // TODO: going forward, most of this stuff should be directly handled by the view

        function refetchEvents() { // can be called as an API method
            clearEvents();
            fetchAndRenderEvents();
        }

        function rerenderEvents(modifiedEventID) { // can be called as an API method
            clearEvents();
            renderEvents(modifiedEventID);
        }

        function renderEvents(modifiedEventID) { // TODO: remove modifiedEventID hack
            if(elementVisible()) {
                currentView.setEventData(events); // for View.js, TODO: unify with renderEvents
                currentView.renderEvents(events, modifiedEventID); // actually render the DOM elements
                currentView.trigger('eventAfterAllRender');
            }
        }

        function clearEvents() {
            currentView.triggerEventDestroy(); // trigger 'eventDestroy' for each event
            currentView.clearEvents(); // actually remove the DOM elements
            currentView.clearEventData(); // for View.js, TODO: unify with clearEvents
        }

        function getAndRenderEvents() {
            if(!options.lazyFetching || isFetchNeeded(currentView.visStart, currentView.visEnd)) {
                fetchAndRenderEvents();
            } else {
                renderEvents();
            }
        }

        function fetchAndRenderEvents() {
            fetchEvents(currentView.visStart, currentView.visEnd);
            // ... will call reportEvents
            // ... which will call renderEvents
        }

        // called when event data arrives
        function reportEvents(_events) {
            events = _events;
            renderEvents();
        }

        // called when a single event's data has been changed
        function reportEventChange(eventID) {
            rerenderEvents(eventID);
        }

        /* Header Updating
		-----------------------------------------------------------------------------*/

        function updateTitle() {
            header.updateTitle(currentView.title);
        }

        function updateTodayButton() {
            var today = new Date();
            if(today >= currentView.start && today < currentView.end) {
                header.disableButton('today');
            } else {
                header.enableButton('today');
            }
        }

        /* Selection
		-----------------------------------------------------------------------------*/

        function select(start, end, allDay) {
            currentView.select(start, end, allDay === undefined ? true : allDay);
        }

        function unselect() { // safe to be called before renderView
            if(currentView) {
                currentView.unselect();
            }
        }

        /* Date
		-----------------------------------------------------------------------------*/

        function prev() {
            renderView(-1);
        }

        function next() {
            renderView(1);
        }

        function prevYear() {
            addYears(date, -1);
            renderView();
        }

        function nextYear() {
            addYears(date, 1);
            renderView();
        }

        function today() {
            date = new Date();
            renderView();
        }

        function gotoDate(year, month, dateOfMonth) {
            if(year instanceof Date) {
                date = cloneDate(year); // provided 1 argument, a Date
            } else {
                setYMD(date, year, month, dateOfMonth);
            }
            renderView();
        }

        function incrementDate(years, months, days) {
            if(years !== undefined) {
                addYears(date, years);
            }
            if(months !== undefined) {
                addMonths(date, months);
            }
            if(days !== undefined) {
                addDays(date, days);
            }
            renderView();
        }

        function getDate() {
            return cloneDate(date);
        }

        /* Height "Freezing"
		-----------------------------------------------------------------------------*/

        function freezeContentHeight() {
            content.css({
                width: '100%',
                height: content.height(),
                overflow: 'hidden'
            });
        }

        function unfreezeContentHeight() {
            content.css({
                width: '',
                height: '',
                overflow: ''
            });
        }

        /* Misc
		-----------------------------------------------------------------------------*/

        function getView() {
            return currentView;
        }

        function option(name, value) {
            if(value === undefined) {
                return options[name];
            }
            if(name == 'height' || name == 'contentHeight' || name == 'aspectRatio') {
                options[name] = value;
                updateSize();
            }
        }

        function trigger(name, thisObj) {
            if(options[name]) {
                return options[name].apply(
                    thisObj || _element,
                    Array.prototype.slice.call(arguments, 2)
                );
            }
        }

        /* External Dragging
		------------------------------------------------------------------------*/

        if(options.droppable) {
            $(document)
                .bind('dragstart', function(ev, ui) {
                    var _e = ev.target;
                    var e = $(_e);
                    if(!e.parents('.fc').length) { // not already inside a calendar
                        var accept = options.dropAccept;
                        if($.isFunction(accept) ? accept.call(_e, e) : e.is(accept)) {
                            _dragElement = _e;
                            currentView.dragStart(_dragElement, ev, ui);
                        }
                    }
                })
                .bind('dragstop', function(ev, ui) {
                    if(_dragElement) {
                        currentView.dragStop(_dragElement, ev, ui);
                        _dragElement = null;
                    }
                });
        }

    }

    ;;

    function Header(calendar, options) {
        var t = this;

        // exports
        t.render = render;
        t.destroy = destroy;
        t.updateTitle = updateTitle;
        t.activateButton = activateButton;
        t.deactivateButton = deactivateButton;
        t.disableButton = disableButton;
        t.enableButton = enableButton;

        // locals
        var element = $([]);
        var tm;

        function render() {
            tm = options.theme ? 'ui' : 'fc';
            var sections = options.header;
            if(sections) {
                element = $("<table class='fc-header' style='width:100%'/>")
                    .append(
                        $("<tr/>")
                            .append(renderSection('left'))
                            .append(renderSection('center'))
                            .append(renderSection('right'))
                    );
                return element;
            }
        }

        function destroy() {
            element.remove();
        }

        function renderSection(position) {
            var e = $("<td class='fc-header-" + position + "'/>");
            var buttonStr = options.header[position];
            if(buttonStr) {
                $.each(buttonStr.split(' '), function(i) {
                    if(i > 0) {
                        e.append("<span class='fc-header-space'/>");
                    }
                    var prevButton;
                    $.each(this.split(','), function(j, buttonName) {
                        if(buttonName == 'title') {
                            e.append("<span class='fc-header-title'><h2>&nbsp;</h2></span>");
                            if(prevButton) {
                                prevButton.addClass(tm + '-corner-right');
                            }
                            prevButton = null;
                        } else {
                            var buttonClick;
                            if(calendar[buttonName]) {
                                buttonClick = calendar[buttonName]; // calendar method
                            } else if(fcViews[buttonName]) {
                                buttonClick = function() {
                                    button.removeClass(tm + '-state-hover'); // forget why
                                    calendar.changeView(buttonName);
                                };
                            }
                            if(buttonClick) {
                                var icon = options.theme ? smartProperty(options.buttonIcons, buttonName) : null; // why are we using smartProperty here?
                                var text = smartProperty(options.buttonText, buttonName); // why are we using smartProperty here?
                                var button = $(
                                    "<span class='fc-button fc-button-" + buttonName + " " + tm + "-state-default'>" +
                                    (icon ?
                                            "<span class='fc-icon-wrap'>" +
                                            "<span class='ui-icon ui-icon-" + icon + "'/>" +
                                            "</span>" :
                                            text
                                    ) +
                                    "</span>"
                                )
                                    .click(function() {
                                        if(!button.hasClass(tm + '-state-disabled')) {
                                            buttonClick();
                                        }
                                    })
                                    .mousedown(function() {
                                        button
                                            .not('.' + tm + '-state-active')
                                            .not('.' + tm + '-state-disabled')
                                            .addClass(tm + '-state-down');
                                    })
                                    .mouseup(function() {
                                        button.removeClass(tm + '-state-down');
                                    })
                                    .hover(
                                        function() {
                                            button
                                                .not('.' + tm + '-state-active')
                                                .not('.' + tm + '-state-disabled')
                                                .addClass(tm + '-state-hover');
                                        },
                                        function() {
                                            button
                                                .removeClass(tm + '-state-hover')
                                                .removeClass(tm + '-state-down');
                                        }
                                    )
                                    .appendTo(e);
                                disableTextSelection(button);
                                if(!prevButton) {
                                    button.addClass(tm + '-corner-left');
                                }
                                prevButton = button;
                            }
                        }
                    });
                    if(prevButton) {
                        prevButton.addClass(tm + '-corner-right');
                    }
                });
            }
            return e;
        }

        function updateTitle(html) {
            element.find('h2')
                .html(html);
        }

        function activateButton(buttonName) {
            element.find('span.fc-button-' + buttonName)
                .addClass(tm + '-state-active');
        }

        function deactivateButton(buttonName) {
            element.find('span.fc-button-' + buttonName)
                .removeClass(tm + '-state-active');
        }

        function disableButton(buttonName) {
            element.find('span.fc-button-' + buttonName)
                .addClass(tm + '-state-disabled');
        }

        function enableButton(buttonName) {
            element.find('span.fc-button-' + buttonName)
                .removeClass(tm + '-state-disabled');
        }

    }

    ;;

    fc.sourceNormalizers = [];
    fc.sourceFetchers = [];

    var ajaxDefaults = {
        dataType: 'json',
        cache: false
    };

    var eventGUID = 1;

    function EventManager(options, _sources) {
        var t = this;

        // exports
        t.isFetchNeeded = isFetchNeeded;
        t.fetchEvents = fetchEvents;
        t.addEventSource = addEventSource;
        t.removeEventSource = removeEventSource;
        t.updateEvent = updateEvent;
        t.renderEvent = renderEvent;
        t.removeEvents = removeEvents;
        t.clientEvents = clientEvents;
        t.normalizeEvent = normalizeEvent;

        // imports
        var trigger = t.trigger;
        var getView = t.getView;
        var reportEvents = t.reportEvents;

        // locals
        var stickySource = {
            events: []
        };
        var sources = [stickySource];
        var rangeStart, rangeEnd;
        var currentFetchID = 0;
        var pendingSourceCnt = 0;
        var loadingLevel = 0;
        var cache = [];

        for(var i = 0; i < _sources.length; i++) {
            _addEventSource(_sources[i]);
        }

        /* Fetching
		-----------------------------------------------------------------------------*/

        function isFetchNeeded(start, end) {
            return !rangeStart || start < rangeStart || end > rangeEnd;
        }

        function fetchEvents(start, end) {
            rangeStart = start;
            rangeEnd = end;
            cache = [];
            var fetchID = ++currentFetchID;
            var len = sources.length;
            pendingSourceCnt = len;
            for(var i = 0; i < len; i++) {
                fetchEventSource(sources[i], fetchID);
            }
        }

        function fetchEventSource(source, fetchID) {
            _fetchEventSource(source, function(events) {
                if(fetchID == currentFetchID) {
                    if(events) {

                        if(options.eventDataTransform) {
                            events = $.map(events, options.eventDataTransform);
                        }
                        if(source.eventDataTransform) {
                            events = $.map(events, source.eventDataTransform);
                        }
                        // TODO: this technique is not ideal for static array event sources.
                        //  For arrays, we'll want to process all events right in the beginning, then never again.

                        for(var i = 0; i < events.length; i++) {
                            events[i].source = source;
                            normalizeEvent(events[i]);
                        }
                        cache = cache.concat(events);
                    }
                    pendingSourceCnt--;
                    if(!pendingSourceCnt) {
                        reportEvents(cache);
                    }
                }
            });
        }

        function _fetchEventSource(source, callback) {
            var i;
            var fetchers = fc.sourceFetchers;
            var res;
            for(i = 0; i < fetchers.length; i++) {
                res = fetchers[i](source, rangeStart, rangeEnd, callback);
                if(res === true) {
                    // the fetcher is in charge. made its own async request
                    return;
                } else if(typeof res == 'object') {
                    // the fetcher returned a new source. process it
                    _fetchEventSource(res, callback);
                    return;
                }
            }
            var events = source.events;
            if(events) {
                if($.isFunction(events)) {
                    pushLoading();
                    events(cloneDate(rangeStart), cloneDate(rangeEnd), function(events) {
                        callback(events);
                        popLoading();
                    });
                } else if($.isArray(events)) {
                    callback(events);
                } else {
                    callback();
                }
            } else {
                var url = source.url;
                if(url) {
                    var success = source.success;
                    var error = source.error;
                    var complete = source.complete;

                    // retrieve any outbound GET/POST $.ajax data from the options
                    var customData;
                    if($.isFunction(source.data)) {
                        // supplied as a function that returns a key/value object
                        customData = source.data();
                    } else {
                        // supplied as a straight key/value object
                        customData = source.data;
                    }

                    // use a copy of the custom data so we can modify the parameters
                    // and not affect the passed-in object.
                    var data = $.extend({}, customData || {});

                    var startParam = firstDefined(source.startParam, options.startParam);
                    var endParam = firstDefined(source.endParam, options.endParam);
                    if(startParam) {
                        data[startParam] = Math.round(+rangeStart / 1000);
                    }
                    if(endParam) {
                        data[endParam] = Math.round(+rangeEnd / 1000);
                    }

                    pushLoading();
                    $.ajax($.extend({}, ajaxDefaults, source, {
                        data: data,
                        success: function(events) {
                            events = events || [];
                            var res = applyAll(success, this, arguments);
                            if($.isArray(res)) {
                                events = res;
                            }
                            callback(events);
                        },
                        error: function() {
                            applyAll(error, this, arguments);
                            callback();
                        },
                        complete: function() {
                            applyAll(complete, this, arguments);
                            popLoading();
                        }
                    }));
                } else {
                    callback();
                }
            }
        }

        /* Sources
		-----------------------------------------------------------------------------*/

        function addEventSource(source) {
            source = _addEventSource(source);
            if(source) {
                pendingSourceCnt++;
                fetchEventSource(source, currentFetchID); // will eventually call reportEvents
            }
        }

        function _addEventSource(source) {
            if($.isFunction(source) || $.isArray(source)) {
                source = {
                    events: source
                };
            } else if(typeof source == 'string') {
                source = {
                    url: source
                };
            }
            if(typeof source == 'object') {
                normalizeSource(source);
                sources.push(source);
                return source;
            }
        }

        function removeEventSource(source) {
            sources = $.grep(sources, function(src) {
                return !isSourcesEqual(src, source);
            });
            // remove all client events from that source
            cache = $.grep(cache, function(e) {
                return !isSourcesEqual(e.source, source);
            });
            reportEvents(cache);
        }

        /* Manipulation
		-----------------------------------------------------------------------------*/

        function updateEvent(event) { // update an existing event
            var i, len = cache.length,
                e,
                defaultEventEnd = getView().defaultEventEnd, // getView???
                startDelta = event.start - event._start,
                endDelta = event.end ?
                    (event.end - (event._end || defaultEventEnd(event))) // event._end would be null if event.end
                    :
                    0; // was null and event was just resized
            for(i = 0; i < len; i++) {
                e = cache[i];
                if(e._id == event._id && e != event) {
                    e.start = new Date(+e.start + startDelta);
                    if(event.end) {
                        if(e.end) {
                            e.end = new Date(+e.end + endDelta);
                        } else {
                            e.end = new Date(+defaultEventEnd(e) + endDelta);
                        }
                    } else {
                        e.end = null;
                    }
                    e.title = event.title;
                    e.url = event.url;
                    e.allDay = event.allDay;
                    e.className = event.className;
                    e.editable = event.editable;
                    e.color = event.color;
                    e.backgroundColor = event.backgroundColor;
                    e.borderColor = event.borderColor;
                    e.textColor = event.textColor;
                    normalizeEvent(e);
                }
            }
            normalizeEvent(event);
            reportEvents(cache);
        }

        function renderEvent(event, stick) {
            normalizeEvent(event);
            if(!event.source) {
                if(stick) {
                    stickySource.events.push(event);
                    event.source = stickySource;
                }
                cache.push(event);
            }
            reportEvents(cache);
        }

        function removeEvents(filter) {
            if(!filter) { // remove all
                cache = [];
                // clear all array sources
                for(var i = 0; i < sources.length; i++) {
                    if($.isArray(sources[i].events)) {
                        sources[i].events = [];
                    }
                }
            } else {
                if(!$.isFunction(filter)) { // an event ID
                    var id = filter + '';
                    filter = function(e) {
                        return e._id == id;
                    };
                }
                cache = $.grep(cache, filter, true);
                // remove events from array sources
                for(var i = 0; i < sources.length; i++) {
                    if($.isArray(sources[i].events)) {
                        sources[i].events = $.grep(sources[i].events, filter, true);
                    }
                }
            }
            reportEvents(cache);
        }

        function clientEvents(filter) {
            if($.isFunction(filter)) {
                return $.grep(cache, filter);
            } else if(filter) { // an event ID
                filter += '';
                return $.grep(cache, function(e) {
                    return e._id == filter;
                });
            }
            return cache; // else, return all
        }

        /* Loading State
		-----------------------------------------------------------------------------*/

        function pushLoading() {
            if(!loadingLevel++) {
                trigger('loading', null, true, getView());
            }
        }

        function popLoading() {
            if(!--loadingLevel) {
                trigger('loading', null, false, getView());
            }
        }

        /* Event Normalization
		-----------------------------------------------------------------------------*/

        function normalizeEvent(event) {
            var source = event.source || {};
            var ignoreTimezone = firstDefined(source.ignoreTimezone, options.ignoreTimezone);
            event._id = event._id || (event.id === undefined ? '_fc' + eventGUID++ : event.id + '');
            if(event.date) {
                if(!event.start) {
                    event.start = event.date;
                }
                delete event.date;
            }
            event._start = cloneDate(event.start = parseDate(event.start, ignoreTimezone));
            event.end = parseDate(event.end, ignoreTimezone);
            if(event.end && event.end <= event.start) {
                event.end = null;
            }
            event._end = event.end ? cloneDate(event.end) : null;
            if(event.allDay === undefined) {
                event.allDay = firstDefined(source.allDayDefault, options.allDayDefault);
            }
            if(event.className) {
                if(typeof event.className == 'string') {
                    event.className = event.className.split(/\s+/);
                }
            } else {
                event.className = [];
            }
            // TODO: if there is no start date, return false to indicate an invalid event
        }

        /* Utils
		------------------------------------------------------------------------------*/

        function normalizeSource(source) {
            if(source.className) {
                // TODO: repeat code, same code for event classNames
                if(typeof source.className == 'string') {
                    source.className = source.className.split(/\s+/);
                }
            } else {
                source.className = [];
            }
            var normalizers = fc.sourceNormalizers;
            for(var i = 0; i < normalizers.length; i++) {
                normalizers[i](source);
            }
        }

        function isSourcesEqual(source1, source2) {
            return source1 && source2 && getSourcePrimitive(source1) == getSourcePrimitive(source2);
        }

        function getSourcePrimitive(source) {
            return((typeof source == 'object') ? (source.events || source.url) : '') || source;
        }

    }

    ;;

    fc.addDays = addDays;
    fc.cloneDate = cloneDate;
    fc.parseDate = parseDate;
    fc.parseISO8601 = parseISO8601;
    fc.parseTime = parseTime;
    fc.formatDate = formatDate;
    fc.formatDates = formatDates;

    /* Date Math
	-----------------------------------------------------------------------------*/

    var dayIDs = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'],
        DAY_MS = 86400000,
        HOUR_MS = 3600000,
        MINUTE_MS = 60000;

    function addYears(d, n, keepTime) {
        d.setFullYear(d.getFullYear() + n);
        if(!keepTime) {
            clearTime(d);
        }
        return d;
    }

    function addMonths(d, n, keepTime) { // prevents day overflow/underflow
        if(+d) { // prevent infinite looping on invalid dates
            var m = d.getMonth() + n,
                check = cloneDate(d);
            check.setDate(1);
            check.setMonth(m);
            d.setMonth(m);
            if(!keepTime) {
                clearTime(d);
            }
            while(d.getMonth() != check.getMonth()) {
                d.setDate(d.getDate() + (d < check ? 1 : -1));
            }
        }
        return d;
    }

    function addDays(d, n, keepTime) { // deals with daylight savings
        if(+d) {
            var dd = d.getDate() + n,
                check = cloneDate(d);
            check.setHours(9); // set to middle of day
            check.setDate(dd);
            d.setDate(dd);
            if(!keepTime) {
                clearTime(d);
            }
            fixDate(d, check);
        }
        return d;
    }

    function fixDate(d, check) { // force d to be on check's YMD, for daylight savings purposes
        if(+d) { // prevent infinite looping on invalid dates
            while(d.getDate() != check.getDate()) {
                d.setTime(+d + (d < check ? 1 : -1) * HOUR_MS);
            }
        }
    }

    function addMinutes(d, n) {
        d.setMinutes(d.getMinutes() + n);
        return d;
    }

    function clearTime(d) {
        d.setHours(0);
        d.setMinutes(0);
        d.setSeconds(0);
        d.setMilliseconds(0);
        return d;
    }

    function cloneDate(d, dontKeepTime) {
        if(dontKeepTime) {
            return clearTime(new Date(+d));
        }
        return new Date(+d);
    }

    function zeroDate() { // returns a Date with time 00:00:00 and dateOfMonth=1
        var i = 0,
            d;
        do {
            d = new Date(1970, i++, 1);
        } while (d.getHours()); // != 0
        return d;
    }

    function dayDiff(d1, d2) { // d1 - d2
        return Math.round((cloneDate(d1, true) - cloneDate(d2, true)) / DAY_MS);
    }

    function setYMD(date, y, m, d) {
        if(y !== undefined && y != date.getFullYear()) {
            date.setDate(1);
            date.setMonth(0);
            date.setFullYear(y);
        }
        if(m !== undefined && m != date.getMonth()) {
            date.setDate(1);
            date.setMonth(m);
        }
        if(d !== undefined) {
            date.setDate(d);
        }
    }

    /* Date Parsing
	-----------------------------------------------------------------------------*/

    function parseDate(s, ignoreTimezone) { // ignoreTimezone defaults to true
        if(typeof s == 'object') { // already a Date object
            return s;
        }
        if(typeof s == 'number') { // a UNIX timestamp
            return new Date(s * 1000);
        }
        if(typeof s == 'string') {
            if(s.match(/^\d+(\.\d+)?$/)) { // a UNIX timestamp
                return new Date(parseFloat(s) * 1000);
            }
            if(ignoreTimezone === undefined) {
                ignoreTimezone = true;
            }
            return parseISO8601(s, ignoreTimezone) || (s ? new Date(s) : null);
        }
        // TODO: never return invalid dates (like from new Date(<string>)), return null instead
        return null;
    }

    function parseISO8601(s, ignoreTimezone) { // ignoreTimezone defaults to false
        // derived from http://delete.me.uk/2005/03/iso8601.html
        // TODO: for a know glitch/feature, read tests/issue_206_parseDate_dst.html
        var m = s.match(/^([0-9]{4})(-([0-9]{2})(-([0-9]{2})([T ]([0-9]{2}):([0-9]{2})(:([0-9]{2})(\.([0-9]+))?)?(Z|(([-+])([0-9]{2})(:?([0-9]{2}))?))?)?)?)?$/);
        if(!m) {
            return null;
        }
        var date = new Date(m[1], 0, 1);
        if(ignoreTimezone || !m[13]) {
            var check = new Date(m[1], 0, 1, 9, 0);
            if(m[3]) {
                date.setMonth(m[3] - 1);
                check.setMonth(m[3] - 1);
            }
            if(m[5]) {
                date.setDate(m[5]);
                check.setDate(m[5]);
            }
            fixDate(date, check);
            if(m[7]) {
                date.setHours(m[7]);
            }
            if(m[8]) {
                date.setMinutes(m[8]);
            }
            if(m[10]) {
                date.setSeconds(m[10]);
            }
            if(m[12]) {
                date.setMilliseconds(Number("0." + m[12]) * 1000);
            }
            fixDate(date, check);
        } else {
            date.setUTCFullYear(
                m[1],
                m[3] ? m[3] - 1 : 0,
                m[5] || 1
            );
            date.setUTCHours(
                m[7] || 0,
                m[8] || 0,
                m[10] || 0,
                m[12] ? Number("0." + m[12]) * 1000 : 0
            );
            if(m[14]) {
                var offset = Number(m[16]) * 60 + (m[18] ? Number(m[18]) : 0);
                offset *= m[15] == '-' ? 1 : -1;
                date = new Date(+date + (offset * 60 * 1000));
            }
        }
        return date;
    }

    function parseTime(s) { // returns minutes since start of day
        if(typeof s == 'number') { // an hour
            return s * 60;
        }
        if(typeof s == 'object') { // a Date object
            return s.getHours() * 60 + s.getMinutes();
        }
        var m = s.match(/(\d+)(?::(\d+))?\s*(\w+)?/);
        if(m) {
            var h = parseInt(m[1], 10);
            if(m[3]) {
                h %= 12;
                if(m[3].toLowerCase().charAt(0) == 'p') {
                    h += 12;
                }
            }
            return h * 60 + (m[2] ? parseInt(m[2], 10) : 0);
        }
    }

    /* Date Formatting
	-----------------------------------------------------------------------------*/
    // TODO: use same function formatDate(date, [date2], format, [options])

    function formatDate(date, format, options) {
        return formatDates(date, null, format, options);
    }

    function formatDates(date1, date2, format, options) {
        options = options || defaults;
        var date = date1,
            otherDate = date2,
            i, len = format.length,
            c,
            i2, formatter,
            res = '';
        for(i = 0; i < len; i++) {
            c = format.charAt(i);
            if(c == "'") {
                for(i2 = i + 1; i2 < len; i2++) {
                    if(format.charAt(i2) == "'") {
                        if(date) {
                            if(i2 == i + 1) {
                                res += "'";
                            } else {
                                res += format.substring(i + 1, i2);
                            }
                            i = i2;
                        }
                        break;
                    }
                }
            } else if(c == '(') {
                for(i2 = i + 1; i2 < len; i2++) {
                    if(format.charAt(i2) == ')') {
                        var subres = formatDate(date, format.substring(i + 1, i2), options);
                        if(parseInt(subres.replace(/\D/, ''), 10)) {
                            res += subres;
                        }
                        i = i2;
                        break;
                    }
                }
            } else if(c == '[') {
                for(i2 = i + 1; i2 < len; i2++) {
                    if(format.charAt(i2) == ']') {
                        var subformat = format.substring(i + 1, i2);
                        var subres = formatDate(date, subformat, options);
                        if(subres != formatDate(otherDate, subformat, options)) {
                            res += subres;
                        }
                        i = i2;
                        break;
                    }
                }
            } else if(c == '{') {
                date = date2;
                otherDate = date1;
            } else if(c == '}') {
                date = date1;
                otherDate = date2;
            } else {
                for(i2 = len; i2 > i; i2--) {
                    if(formatter = dateFormatters[format.substring(i, i2)]) {
                        if(date) {
                            res += formatter(date, options);
                        }
                        i = i2 - 1;
                        break;
                    }
                }
                if(i2 == i) {
                    if(date) {
                        res += c;
                    }
                }
            }
        }
        return res;
    };

    var dateFormatters = {
        s: function(d) {
            return d.getSeconds()
        },
        ss: function(d) {
            return zeroPad(d.getSeconds())
        },
        m: function(d) {
            return d.getMinutes()
        },
        mm: function(d) {
            return zeroPad(d.getMinutes())
        },
        h: function(d) {
            return d.getHours() % 12 || 12
        },
        hh: function(d) {
            return zeroPad(d.getHours() % 12 || 12)
        },
        H: function(d) {
            return d.getHours()
        },
        HH: function(d) {
            return zeroPad(d.getHours())
        },
        d: function(d) {
            return d.getDate()
        },
        dd: function(d) {
            return zeroPad(d.getDate())
        },
        ddd: function(d, o) {
            return o.dayNamesShort[d.getDay()]
        },
        dddd: function(d, o) {
            return o.dayNames[d.getDay()]
        },
        M: function(d) {
            return d.getMonth() + 1
        },
        MM: function(d) {
            return zeroPad(d.getMonth() + 1)
        },
        MMM: function(d, o) {
            return o.monthNamesShort[d.getMonth()]
        },
        MMMM: function(d, o) {
            return o.monthNames[d.getMonth()]
        },
        yy: function(d) {
            return(d.getFullYear() + '').substring(2)
        },
        yyyy: function(d) {
            return d.getFullYear()
        },
        t: function(d) {
            return d.getHours() < 12 ? 'a' : 'p'
        },
        tt: function(d) {
            return d.getHours() < 12 ? 'am' : 'pm'
        },
        T: function(d) {
            return d.getHours() < 12 ? 'A' : 'P'
        },
        TT: function(d) {
            return d.getHours() < 12 ? 'AM' : 'PM'
        },
        u: function(d) {
            return formatDate(d, "yyyy-MM-dd'T'HH:mm:ss'Z'")
        },
        S: function(d) {
            var date = d.getDate();
            if(date > 10 && date < 20) {
                return 'th';
            }
            return ['st', 'nd', 'rd'][date % 10 - 1] || 'th';
        },
        w: function(d, o) { // local
            return o.weekNumberCalculation(d);
        },
        W: function(d) { // ISO
            return iso8601Week(d);
        }
    };
    fc.dateFormatters = dateFormatters;

    /* thanks jQuery UI (https://github.com/jquery/jquery-ui/blob/master/ui/jquery.ui.datepicker.js)
	 *
	 * Set as calculateWeek to determine the week of the year based on the ISO 8601 definition.
	 * `date` - the date to get the week for
	 * `number` - the number of the week within the year that contains this date
	 */
    function iso8601Week(date) {
        var time;
        var checkDate = new Date(date.getTime());

        // Find Thursday of this week starting on Monday
        checkDate.setDate(checkDate.getDate() + 4 - (checkDate.getDay() || 7));

        time = checkDate.getTime();
        checkDate.setMonth(0); // Compare with Jan 1
        checkDate.setDate(1);
        return Math.floor(Math.round((time - checkDate) / 86400000) / 7) + 1;
    }

    ;;

    fc.applyAll = applyAll;

    /* Event Date Math
	-----------------------------------------------------------------------------*/

    function exclEndDay(event) {
        if(event.end) {
            return _exclEndDay(event.end, event.allDay);
        } else {
            return addDays(cloneDate(event.start), 1);
        }
    }

    function _exclEndDay(end, allDay) {
        end = cloneDate(end);
        return allDay || end.getHours() || end.getMinutes() ? addDays(end, 1) : clearTime(end);
        // why don't we check for seconds/ms too?
    }

    /* Event Element Binding
	-----------------------------------------------------------------------------*/

    function lazySegBind(container, segs, bindHandlers) {
        container.unbind('mouseover').mouseover(function(ev) {
            var parent = ev.target,
                e,
                i, seg;
            while(parent != this) {
                e = parent;
                parent = parent.parentNode;
            }
            if((i = e._fci) !== undefined) {
                e._fci = undefined;
                seg = segs[i];
                bindHandlers(seg.event, seg.element, seg);
                $(ev.target).trigger(ev);
            }
            ev.stopPropagation();
        });
    }

    /* Element Dimensions
	-----------------------------------------------------------------------------*/

    function setOuterWidth(element, width, includeMargins) {
        for(var i = 0, e; i < element.length; i++) {
            e = $(element[i]);
            e.width(Math.max(0, width - hsides(e, includeMargins)));
        }
    }

    function setOuterHeight(element, height, includeMargins) {
        for(var i = 0, e; i < element.length; i++) {
            e = $(element[i]);
            e.height(Math.max(0, height - vsides(e, includeMargins)));
        }
    }

    function hsides(element, includeMargins) {
        return hpadding(element) + hborders(element) + (includeMargins ? hmargins(element) : 0);
    }

    function hpadding(element) {
        return(parseFloat($.css(element[0], 'paddingLeft', true)) || 0) +
            (parseFloat($.css(element[0], 'paddingRight', true)) || 0);
    }

    function hmargins(element) {
        return(parseFloat($.css(element[0], 'marginLeft', true)) || 0) +
            (parseFloat($.css(element[0], 'marginRight', true)) || 0);
    }

    function hborders(element) {
        return(parseFloat($.css(element[0], 'borderLeftWidth', true)) || 0) +
            (parseFloat($.css(element[0], 'borderRightWidth', true)) || 0);
    }

    function vsides(element, includeMargins) {
        return vpadding(element) + vborders(element) + (includeMargins ? vmargins(element) : 0);
    }

    function vpadding(element) {
        return(parseFloat($.css(element[0], 'paddingTop', true)) || 0) +
            (parseFloat($.css(element[0], 'paddingBottom', true)) || 0);
    }

    function vmargins(element) {
        return(parseFloat($.css(element[0], 'marginTop', true)) || 0) +
            (parseFloat($.css(element[0], 'marginBottom', true)) || 0);
    }

    function vborders(element) {
        return(parseFloat($.css(element[0], 'borderTopWidth', true)) || 0) +
            (parseFloat($.css(element[0], 'borderBottomWidth', true)) || 0);
    }

    /* Misc Utils
	-----------------------------------------------------------------------------*/

    //TODO: arraySlice
    //TODO: isFunction, grep ?

    function noop() {}

    function dateCompare(a, b) {
        return a - b;
    }

    function arrayMax(a) {
        return Math.max.apply(Math, a);
    }

    function zeroPad(n) {
        return(n < 10 ? '0' : '') + n;
    }

    function smartProperty(obj, name) { // get a camel-cased/namespaced property of an object
        if(obj[name] !== undefined) {
            return obj[name];
        }
        var parts = name.split(/(?=[A-Z])/),
            i = parts.length - 1,
            res;
        for(; i >= 0; i--) {
            res = obj[parts[i].toLowerCase()];
            if(res !== undefined) {
                return res;
            }
        }
        return obj[''];
    }

    function htmlEscape(s) {
        return s.replace(/&/g, '&amp;')
            .replace(/</g, '&lt;')
            .replace(/>/g, '&gt;')
            .replace(/'/g, '&#039;')
            .replace(/"/g, '&quot;')
            .replace(/\n/g, '<br />');
    }

    function disableTextSelection(element) {
        element
            .attr('unselectable', 'on')
            .css('MozUserSelect', 'none')
            .bind('selectstart.ui', function() {
                return false;
            });
    }

    /*
	function enableTextSelection(element) {
		element
			.attr('unselectable', 'off')
			.css('MozUserSelect', '')
			.unbind('selectstart.ui');
	}
	*/

    function markFirstLast(e) {
        e.children()
            .removeClass('fc-first fc-last')
            .filter(':first-child')
            .addClass('fc-first')
            .end()
            .filter(':last-child')
            .addClass('fc-last');
    }

    function setDayID(cell, date) {
        cell.each(function(i, _cell) {
            _cell.className = _cell.className.replace(/^fc-\w*/, 'fc-' + dayIDs[date.getDay()]);
            // TODO: make a way that doesn't rely on order of classes
        });
    }

    function getSkinCss(event, opt) {
        var source = event.source || {};
        var eventColor = event.color;
        var sourceColor = source.color;
        var optionColor = opt('eventColor');
        var backgroundColor =
            event.backgroundColor ||
            eventColor ||
            source.backgroundColor ||
            sourceColor ||
            opt('eventBackgroundColor') ||
            optionColor;
        var borderColor =
            event.borderColor ||
            eventColor ||
            source.borderColor ||
            sourceColor ||
            opt('eventBorderColor') ||
            optionColor;
        var textColor =
            event.textColor ||
            source.textColor ||
            opt('eventTextColor');
        var statements = [];
        if(backgroundColor) {
            statements.push('background-color:' + backgroundColor);
        }
        if(borderColor) {
            statements.push('border-color:' + borderColor);
        }
        if(textColor) {
            statements.push('color:' + textColor);
        }
        return statements.join(';');
    }

    function applyAll(functions, thisObj, args) {
        if($.isFunction(functions)) {
            functions = [functions];
        }
        if(functions) {
            var i;
            var ret;
            for(i = 0; i < functions.length; i++) {
                ret = functions[i].apply(thisObj, args) || ret;
            }
            return ret;
        }
    }

    function firstDefined() {
        for(var i = 0; i < arguments.length; i++) {
            if(arguments[i] !== undefined) {
                return arguments[i];
            }
        }
    }

    ;;

    fcViews.month = MonthView;

    function MonthView(element, calendar) {
        var t = this;

        // exports
        t.render = render;

        // imports
        BasicView.call(t, element, calendar, 'month');
        var opt = t.opt;
        var renderBasic = t.renderBasic;
        var skipHiddenDays = t.skipHiddenDays;
        var getCellsPerWeek = t.getCellsPerWeek;
        var formatDate = calendar.formatDate;

        function render(date, delta) {

            if(delta) {
                addMonths(date, delta);
                date.setDate(1);
            }

            var firstDay = opt('firstDay');

            var start = cloneDate(date, true);
            start.setDate(1);

            var end = addMonths(cloneDate(start), 1);

            var visStart = cloneDate(start);
            addDays(visStart, -((visStart.getDay() - firstDay + 7) % 7));
            skipHiddenDays(visStart);

            var visEnd = cloneDate(end);
            addDays(visEnd, (7 - visEnd.getDay() + firstDay) % 7);
            skipHiddenDays(visEnd, -1, true);

            var colCnt = getCellsPerWeek();
            var rowCnt = Math.round(dayDiff(visEnd, visStart) / 7); // should be no need for Math.round

            if(opt('weekMode') == 'fixed') {
                addDays(visEnd, (6 - rowCnt) * 7); // add weeks to make up for it
                rowCnt = 6;
            }

            t.title = formatDate(start, opt('titleFormat'));

            t.start = start;
            t.end = end;
            t.visStart = visStart;
            t.visEnd = visEnd;

            renderBasic(rowCnt, colCnt, true);
        }

    }

    ;;

    fcViews.basicWeek = BasicWeekView;

    function BasicWeekView(element, calendar) {
        var t = this;

        // exports
        t.render = render;

        // imports
        BasicView.call(t, element, calendar, 'basicWeek');
        var opt = t.opt;
        var renderBasic = t.renderBasic;
        var skipHiddenDays = t.skipHiddenDays;
        var getCellsPerWeek = t.getCellsPerWeek;
        var formatDates = calendar.formatDates;

        function render(date, delta) {

            if(delta) {
                addDays(date, delta * 7);
            }

            var start = addDays(cloneDate(date), -((date.getDay() - opt('firstDay') + 7) % 7));
            var end = addDays(cloneDate(start), 7);

            var visStart = cloneDate(start);
            skipHiddenDays(visStart);

            var visEnd = cloneDate(end);
            skipHiddenDays(visEnd, -1, true);

            var colCnt = getCellsPerWeek();

            t.start = start;
            t.end = end;
            t.visStart = visStart;
            t.visEnd = visEnd;

            t.title = formatDates(
                visStart,
                addDays(cloneDate(visEnd), -1),
                opt('titleFormat')
            );

            renderBasic(1, colCnt, false);
        }

    }

    ;;

    fcViews.basicDay = BasicDayView;

    function BasicDayView(element, calendar) {
        var t = this;

        // exports
        t.render = render;

        // imports
        BasicView.call(t, element, calendar, 'basicDay');
        var opt = t.opt;
        var renderBasic = t.renderBasic;
        var skipHiddenDays = t.skipHiddenDays;
        var formatDate = calendar.formatDate;

        function render(date, delta) {

            if(delta) {
                addDays(date, delta);
            }
            skipHiddenDays(date, delta < 0 ? -1 : 1);

            var start = cloneDate(date, true);
            var end = addDays(cloneDate(start), 1);

            t.title = formatDate(date, opt('titleFormat'));

            t.start = t.visStart = start;
            t.end = t.visEnd = end;

            renderBasic(1, 1, false);
        }

    }

    ;;

    setDefaults({
        weekMode: 'fixed'
    });

    function BasicView(element, calendar, viewName) {
        var t = this;

        // exports
        t.renderBasic = renderBasic;
        t.setHeight = setHeight;
        t.setWidth = setWidth;
        t.renderDayOverlay = renderDayOverlay;
        t.defaultSelectionEnd = defaultSelectionEnd;
        t.renderSelection = renderSelection;
        t.clearSelection = clearSelection;
        t.reportDayClick = reportDayClick; // for selection (kinda hacky)
        t.dragStart = dragStart;
        t.dragStop = dragStop;
        t.defaultEventEnd = defaultEventEnd;
        t.getHoverListener = function() {
            return hoverListener
        };
        t.colLeft = colLeft;
        t.colRight = colRight;
        t.colContentLeft = colContentLeft;
        t.colContentRight = colContentRight;
        t.getIsCellAllDay = function() {
            return true
        };
        t.allDayRow = allDayRow;
        t.getRowCnt = function() {
            return rowCnt
        };
        t.getColCnt = function() {
            return colCnt
        };
        t.getColWidth = function() {
            return colWidth
        };
        t.getDaySegmentContainer = function() {
            return daySegmentContainer
        };

        // imports
        View.call(t, element, calendar, viewName);
        OverlayManager.call(t);
        SelectionManager.call(t);
        BasicEventRenderer.call(t);
        var opt = t.opt;
        var trigger = t.trigger;
        var renderOverlay = t.renderOverlay;
        var clearOverlays = t.clearOverlays;
        var daySelectionMousedown = t.daySelectionMousedown;
        var cellToDate = t.cellToDate;
        var dateToCell = t.dateToCell;
        var rangeToSegments = t.rangeToSegments;
        var formatDate = calendar.formatDate;

        // locals

        var table;
        var head;
        var headCells;
        var body;
        var bodyRows;
        var bodyCells;
        var bodyFirstCells;
        var firstRowCellInners;
        var firstRowCellContentInners;
        var daySegmentContainer;

        var viewWidth;
        var viewHeight;
        var colWidth;
        var weekNumberWidth;

        var rowCnt, colCnt;
        var showNumbers;
        var coordinateGrid;
        var hoverListener;
        var colPositions;
        var colContentPositions;

        var tm;
        var colFormat;
        var showWeekNumbers;
        var weekNumberTitle;
        var weekNumberFormat;

        /* Rendering
		------------------------------------------------------------*/

        disableTextSelection(element.addClass('fc-grid'));

        function renderBasic(_rowCnt, _colCnt, _showNumbers) {
            rowCnt = _rowCnt;
            colCnt = _colCnt;
            showNumbers = _showNumbers;
            updateOptions();

            if(!body) {
                buildEventContainer();
            }

            buildTable();
        }

        function updateOptions() {
            tm = opt('theme') ? 'ui' : 'fc';
            colFormat = opt('columnFormat');

            // week # options. (TODO: bad, logic also in other views)
            showWeekNumbers = opt('weekNumbers');
            weekNumberTitle = opt('weekNumberTitle');
            if(opt('weekNumberCalculation') != 'iso') {
                weekNumberFormat = "w";
            } else {
                weekNumberFormat = "W";
            }
        }

        function buildEventContainer() {
            daySegmentContainer =
                $("<div class='fc-event-container' style='position:absolute;z-index:8;top:0;left:0'/>")
                    .appendTo(element);
        }

        function buildTable() {
            var html = buildTableHTML();

            if(table) {
                table.remove();
            }
            table = $(html).appendTo(element);

            head = table.find('thead');
            headCells = head.find('.fc-day-header');
            body = table.find('tbody');
            bodyRows = body.find('tr');
            bodyCells = body.find('.fc-day');
            bodyFirstCells = bodyRows.find('td:first-child');

            firstRowCellInners = bodyRows.eq(0).find('.fc-day > div');
            firstRowCellContentInners = bodyRows.eq(0).find('.fc-day-content > div');

            markFirstLast(head.add(head.find('tr'))); // marks first+last tr/th's
            markFirstLast(bodyRows); // marks first+last td's
            bodyRows.eq(0).addClass('fc-first');
            bodyRows.filter(':last').addClass('fc-last');

            bodyCells.each(function(i, _cell) {
                var date = cellToDate(
                    Math.floor(i / colCnt),
                    i % colCnt
                );
                trigger('dayRender', t, date, $(_cell));
            });

            dayBind(bodyCells);
        }

        /* HTML Building
		-----------------------------------------------------------*/

        function buildTableHTML() {
            var html =
                "<table class='fc-border-separate' style='width:100%' cellspacing='0'>" +
                buildHeadHTML() +
                buildBodyHTML() +
                "</table>";

            return html;
        }

        function buildHeadHTML() {
            var headerClass = tm + "-widget-header";
            var html = '';
            var col;
            var date;

            html += "<thead><tr>";

            if(showWeekNumbers) {
                html +=
                    "<th class='fc-week-number " + headerClass + "'>" +
                    htmlEscape(weekNumberTitle) +
                    "</th>";
            }

            for(col = 0; col < colCnt; col++) {
                date = cellToDate(0, col);
                html +=
                    "<th class='fc-day-header fc-" + dayIDs[date.getDay()] + " " + headerClass + "'>" +
                    htmlEscape(formatDate(date, colFormat)) +
                    "</th>";
            }

            html += "</tr></thead>";

            return html;
        }

        function buildBodyHTML() {
            var contentClass = tm + "-widget-content";
            var html = '';
            var row;
            var col;
            var date;

            html += "<tbody>";

            for(row = 0; row < rowCnt; row++) {

                html += "<tr class='fc-week'>";

                if(showWeekNumbers) {
                    date = cellToDate(row, 0);
                    html +=
                        "<td class='fc-week-number " + contentClass + "'>" +
                        "<div>" +
                        htmlEscape(formatDate(date, weekNumberFormat)) +
                        "</div>" +
                        "</td>";
                }

                for(col = 0; col < colCnt; col++) {
                    date = cellToDate(row, col);
                    html += buildCellHTML(date);
                }

                html += "</tr>";
            }

            html += "</tbody>";

            return html;
        }

        function buildCellHTML(date) {
            var contentClass = tm + "-widget-content";
            var month = t.start.getMonth();
            var today = clearTime(new Date());
            var html = '';
            var classNames = [
                'fc-day',
                'fc-' + dayIDs[date.getDay()],
                contentClass
            ];

            if(date.getMonth() != month) {
                classNames.push('fc-other-month');
            }
            if(+date == +today) {
                classNames.push(
                    'fc-today',
                    tm + '-state-highlight'
                );
            } else if(date < today) {
                classNames.push('fc-past');
            } else {
                classNames.push('fc-future');
            }

            html +=
                "<td" +
                " class='" + classNames.join(' ') + "'" +
                " data-date='" + formatDate(date, 'yyyy-MM-dd') + "'" +
                ">" +
                "<div>";

            if(showNumbers) {
                html += "<div class='fc-day-number'>" + date.getDate() + "</div>";
            }

            html +=
                "<div class='fc-day-content'>" +
                "<div style='position:relative'>&nbsp;</div>" +
                "</div>" +
                "</div>" +
                "</td>";

            return html;
        }

        /* Dimensions
		-----------------------------------------------------------*/

        function setHeight(height) {
            viewHeight = height;

            var bodyHeight = viewHeight - head.height();
            var rowHeight;
            var rowHeightLast;
            var cell;

            if(opt('weekMode') == 'variable') {
                rowHeight = rowHeightLast = Math.floor(bodyHeight / (rowCnt == 1 ? 2 : 6));
            } else {
                rowHeight = Math.floor(bodyHeight / rowCnt);
                rowHeightLast = bodyHeight - rowHeight * (rowCnt - 1);
            }

            bodyFirstCells.each(function(i, _cell) {
                if(i < rowCnt) {
                    cell = $(_cell);
                    cell.find('> div').css(
                        'min-height',
                        (i == rowCnt - 1 ? rowHeightLast : rowHeight) - vsides(cell)
                    );
                }
            });

        }

        function setWidth(width) {
            viewWidth = width;
            colPositions.clear();
            colContentPositions.clear();

            weekNumberWidth = 0;
            if(showWeekNumbers) {
                weekNumberWidth = head.find('th.fc-week-number').outerWidth();
            }

            colWidth = Math.floor((viewWidth - weekNumberWidth) / colCnt);
            setOuterWidth(headCells.slice(0, -1), colWidth);
        }

        /* Day clicking and binding
		-----------------------------------------------------------*/

        function dayBind(days) {
            days.click(dayClick)
                .mousedown(daySelectionMousedown);
        }

        function dayClick(ev) {
            if(!opt('selectable')) { // if selectable, SelectionManager will worry about dayClick
                var date = parseISO8601($(this).data('date'));
                trigger('dayClick', this, date, true, ev);
            }
        }

        /* Semi-transparent Overlay Helpers
		------------------------------------------------------*/
        // TODO: should be consolidated with AgendaView's methods

        function renderDayOverlay(overlayStart, overlayEnd, refreshCoordinateGrid) { // overlayEnd is exclusive

            if(refreshCoordinateGrid) {
                coordinateGrid.build();
            }

            var segments = rangeToSegments(overlayStart, overlayEnd);

            for(var i = 0; i < segments.length; i++) {
                var segment = segments[i];
                dayBind(
                    renderCellOverlay(
                        segment.row,
                        segment.leftCol,
                        segment.row,
                        segment.rightCol
                    )
                );
            }
        }

        function renderCellOverlay(row0, col0, row1, col1) { // row1,col1 is inclusive
            var rect = coordinateGrid.rect(row0, col0, row1, col1, element);
            return renderOverlay(rect, element);
        }

        /* Selection
		-----------------------------------------------------------------------*/

        function defaultSelectionEnd(startDate, allDay) {
            return cloneDate(startDate);
        }

        function renderSelection(startDate, endDate, allDay) {
            renderDayOverlay(startDate, addDays(cloneDate(endDate), 1), true); // rebuild every time???
        }

        function clearSelection() {
            clearOverlays();
        }

        function reportDayClick(date, allDay, ev) {
            var cell = dateToCell(date);
            var _element = bodyCells[cell.row * colCnt + cell.col];
            trigger('dayClick', _element, date, allDay, ev);
        }

        /* External Dragging
		-----------------------------------------------------------------------*/

        function dragStart(_dragElement, ev, ui) {
            hoverListener.start(function(cell) {
                clearOverlays();
                if(cell) {
                    renderCellOverlay(cell.row, cell.col, cell.row, cell.col);
                }
            }, ev);
        }

        function dragStop(_dragElement, ev, ui) {
            var cell = hoverListener.stop();
            clearOverlays();
            if(cell) {
                var d = cellToDate(cell);
                trigger('drop', _dragElement, d, true, ev, ui);
            }
        }

        /* Utilities
		--------------------------------------------------------*/

        function defaultEventEnd(event) {
            return cloneDate(event.start);
        }

        coordinateGrid = new CoordinateGrid(function(rows, cols) {
            var e, n, p;
            headCells.each(function(i, _e) {
                e = $(_e);
                n = e.offset().left;
                if(i) {
                    p[1] = n;
                }
                p = [n];
                cols[i] = p;
            });
            p[1] = n + e.outerWidth();
            bodyRows.each(function(i, _e) {
                if(i < rowCnt) {
                    e = $(_e);
                    n = e.offset().top;
                    if(i) {
                        p[1] = n;
                    }
                    p = [n];
                    rows[i] = p;
                }
            });
            p[1] = n + e.outerHeight();
        });

        hoverListener = new HoverListener(coordinateGrid);

        colPositions = new HorizontalPositionCache(function(col) {
            return firstRowCellInners.eq(col);
        });

        colContentPositions = new HorizontalPositionCache(function(col) {
            return firstRowCellContentInners.eq(col);
        });

        function colLeft(col) {
            return colPositions.left(col);
        }

        function colRight(col) {
            return colPositions.right(col);
        }

        function colContentLeft(col) {
            return colContentPositions.left(col);
        }

        function colContentRight(col) {
            return colContentPositions.right(col);
        }

        function allDayRow(i) {
            return bodyRows.eq(i);
        }

    }

    ;;

    function BasicEventRenderer() {
        var t = this;

        // exports
        t.renderEvents = renderEvents;
        t.clearEvents = clearEvents;

        // imports
        DayEventRenderer.call(t);

        function renderEvents(events, modifiedEventId) {
            t.renderDayEvents(events, modifiedEventId);
        }

        function clearEvents() {
            t.getDaySegmentContainer().empty();
        }

        // TODO: have this class (and AgendaEventRenderer) be responsible for creating the event container div

    }

    ;;

    fcViews.agendaWeek = AgendaWeekView;

    function AgendaWeekView(element, calendar) {
        var t = this;

        // exports
        t.render = render;

        // imports
        AgendaView.call(t, element, calendar, 'agendaWeek');
        var opt = t.opt;
        var renderAgenda = t.renderAgenda;
        var skipHiddenDays = t.skipHiddenDays;
        var getCellsPerWeek = t.getCellsPerWeek;
        var formatDates = calendar.formatDates;

        function render(date, delta) {

            if(delta) {
                addDays(date, delta * 7);
            }

            var start = addDays(cloneDate(date), -((date.getDay() - opt('firstDay') + 7) % 7));
            var end = addDays(cloneDate(start), 7);

            var visStart = cloneDate(start);
            skipHiddenDays(visStart);

            var visEnd = cloneDate(end);
            skipHiddenDays(visEnd, -1, true);

            var colCnt = getCellsPerWeek();

            t.title = formatDates(
                visStart,
                addDays(cloneDate(visEnd), -1),
                opt('titleFormat')
            );

            t.start = start;
            t.end = end;
            t.visStart = visStart;
            t.visEnd = visEnd;

            renderAgenda(colCnt);
        }

    }

    ;;

    fcViews.agendaDay = AgendaDayView;

    function AgendaDayView(element, calendar) {
        var t = this;

        // exports
        t.render = render;

        // imports
        AgendaView.call(t, element, calendar, 'agendaDay');
        var opt = t.opt;
        var renderAgenda = t.renderAgenda;
        var skipHiddenDays = t.skipHiddenDays;
        var formatDate = calendar.formatDate;

        function render(date, delta) {

            if(delta) {
                addDays(date, delta);
            }
            skipHiddenDays(date, delta < 0 ? -1 : 1);

            var start = cloneDate(date, true);
            var end = addDays(cloneDate(start), 1);

            t.title = formatDate(date, opt('titleFormat'));

            t.start = t.visStart = start;
            t.end = t.visEnd = end;

            renderAgenda(1);
        }

    }

    ;;

    setDefaults({
        allDaySlot: true,
        allDayText: 'all-day',
        firstHour: 6,
        slotMinutes: 30,
        defaultEventMinutes: 120,
        axisFormat: 'h(:mm)tt',
        timeFormat: {
            agenda: 'h:mm{ - h:mm}'
        },
        dragOpacity: {
            agenda: .5
        },
        minTime: 0,
        maxTime: 24,
        slotEventOverlap: true
    });

    // TODO: make it work in quirks mode (event corners, all-day height)
    // TODO: test liquid width, especially in IE6

    function AgendaView(element, calendar, viewName) {
        var t = this;

        // exports
        t.renderAgenda = renderAgenda;
        t.setWidth = setWidth;
        t.setHeight = setHeight;
        t.afterRender = afterRender;
        t.defaultEventEnd = defaultEventEnd;
        t.timePosition = timePosition;
        t.getIsCellAllDay = getIsCellAllDay;
        t.allDayRow = getAllDayRow;
        t.getCoordinateGrid = function() {
            return coordinateGrid
        }; // specifically for AgendaEventRenderer
        t.getHoverListener = function() {
            return hoverListener
        };
        t.colLeft = colLeft;
        t.colRight = colRight;
        t.colContentLeft = colContentLeft;
        t.colContentRight = colContentRight;
        t.getDaySegmentContainer = function() {
            return daySegmentContainer
        };
        t.getSlotSegmentContainer = function() {
            return slotSegmentContainer
        };
        t.getMinMinute = function() {
            return minMinute
        };
        t.getMaxMinute = function() {
            return maxMinute
        };
        t.getSlotContainer = function() {
            return slotContainer
        };
        t.getRowCnt = function() {
            return 1
        };
        t.getColCnt = function() {
            return colCnt
        };
        t.getColWidth = function() {
            return colWidth
        };
        t.getSnapHeight = function() {
            return snapHeight
        };
        t.getSnapMinutes = function() {
            return snapMinutes
        };
        t.defaultSelectionEnd = defaultSelectionEnd;
        t.renderDayOverlay = renderDayOverlay;
        t.renderSelection = renderSelection;
        t.clearSelection = clearSelection;
        t.reportDayClick = reportDayClick; // selection mousedown hack
        t.dragStart = dragStart;
        t.dragStop = dragStop;

        // imports
        View.call(t, element, calendar, viewName);
        OverlayManager.call(t);
        SelectionManager.call(t);
        AgendaEventRenderer.call(t);
        var opt = t.opt;
        var trigger = t.trigger;
        var renderOverlay = t.renderOverlay;
        var clearOverlays = t.clearOverlays;
        var reportSelection = t.reportSelection;
        var unselect = t.unselect;
        var daySelectionMousedown = t.daySelectionMousedown;
        var slotSegHtml = t.slotSegHtml;
        var cellToDate = t.cellToDate;
        var dateToCell = t.dateToCell;
        var rangeToSegments = t.rangeToSegments;
        var formatDate = calendar.formatDate;

        // locals

        var dayTable;
        var dayHead;
        var dayHeadCells;
        var dayBody;
        var dayBodyCells;
        var dayBodyCellInners;
        var dayBodyCellContentInners;
        var dayBodyFirstCell;
        var dayBodyFirstCellStretcher;
        var slotLayer;
        var daySegmentContainer;
        var allDayTable;
        var allDayRow;
        var slotScroller;
        var slotContainer;
        var slotSegmentContainer;
        var slotTable;
        var selectionHelper;

        var viewWidth;
        var viewHeight;
        var axisWidth;
        var colWidth;
        var gutterWidth;
        var slotHeight; // TODO: what if slotHeight changes? (see issue 650)

        var snapMinutes;
        var snapRatio; // ratio of number of "selection" slots to normal slots. (ex: 1, 2, 4)
        var snapHeight; // holds the pixel hight of a "selection" slot

        var colCnt;
        var slotCnt;
        var coordinateGrid;
        var hoverListener;
        var colPositions;
        var colContentPositions;
        var slotTopCache = {};

        var tm;
        var rtl;
        var minMinute, maxMinute;
        var colFormat;
        var showWeekNumbers;
        var weekNumberTitle;
        var weekNumberFormat;

        /* Rendering
		-----------------------------------------------------------------------------*/

        disableTextSelection(element.addClass('fc-agenda'));

        function renderAgenda(c) {
            colCnt = c;
            updateOptions();

            if(!dayTable) { // first time rendering?
                buildSkeleton(); // builds day table, slot area, events containers
            } else {
                buildDayTable(); // rebuilds day table
            }
        }

        function updateOptions() {

            tm = opt('theme') ? 'ui' : 'fc';
            rtl = opt('isRTL')
            minMinute = parseTime(opt('minTime'));
            maxMinute = parseTime(opt('maxTime'));
            colFormat = opt('columnFormat');

            // week # options. (TODO: bad, logic also in other views)
            showWeekNumbers = opt('weekNumbers');
            weekNumberTitle = opt('weekNumberTitle');
            if(opt('weekNumberCalculation') != 'iso') {
                weekNumberFormat = "w";
            } else {
                weekNumberFormat = "W";
            }

            snapMinutes = opt('snapMinutes') || opt('slotMinutes');
        }

        /* Build DOM
		-----------------------------------------------------------------------*/

        function buildSkeleton() {
            var headerClass = tm + "-widget-header";
            var contentClass = tm + "-widget-content";
            var s;
            var d;
            var i;
            var maxd;
            var minutes;
            var slotNormal = opt('slotMinutes') % 15 == 0;

            buildDayTable();

            slotLayer =
                $("<div style='position:absolute;z-index:2;left:0;width:100%'/>")
                    .appendTo(element);

            if(opt('allDaySlot')) {

                daySegmentContainer =
                    $("<div class='fc-event-container' style='position:absolute;z-index:8;top:0;left:0'/>")
                        .appendTo(slotLayer);

                s =
                    "<table style='width:100%' class='fc-agenda-allday' cellspacing='0'>" +
                    "<tr>" +
                    "<th class='" + headerClass + " fc-agenda-axis'>" + opt('allDayText') + "</th>" +
                    "<td>" +
                    "<div class='fc-day-content'><div style='position:relative'/></div>" +
                    "</td>" +
                    "<th class='" + headerClass + " fc-agenda-gutter'>&nbsp;</th>" +
                    "</tr>" +
                    "</table>";
                allDayTable = $(s).appendTo(slotLayer);
                allDayRow = allDayTable.find('tr');

                dayBind(allDayRow.find('td'));

                slotLayer.append(
                    "<div class='fc-agenda-divider " + headerClass + "'>" +
                    "<div class='fc-agenda-divider-inner'/>" +
                    "</div>"
                );

            } else {

                daySegmentContainer = $([]); // in jQuery 1.4, we can just do $()

            }

            slotScroller =
                $("<div style='position:absolute;width:100%;overflow-x:hidden;overflow-y:auto'/>")
                    .appendTo(slotLayer);

            slotContainer =
                $("<div style='position:relative;width:100%;overflow:hidden'/>")
                    .appendTo(slotScroller);

            slotSegmentContainer =
                $("<div class='fc-event-container' style='position:absolute;z-index:8;top:0;left:0'/>")
                    .appendTo(slotContainer);

            s =
                "<table class='fc-agenda-slots' style='width:100%' cellspacing='0'>" +
                "<tbody>";
            d = zeroDate();
            maxd = addMinutes(cloneDate(d), maxMinute);
            addMinutes(d, minMinute);
            slotCnt = 0;
            for(i = 0; d < maxd; i++) {
                minutes = d.getMinutes();
                s +=
                    "<tr class='fc-slot" + i + ' ' + (!minutes ? '' : 'fc-minor') + "'>" +
                    "<th class='fc-agenda-axis " + headerClass + "'>" +
                    ((!slotNormal || !minutes) ? formatDate(d, opt('axisFormat')) : '&nbsp;') +
                    "</th>" +
                    "<td class='" + contentClass + "'>" +
                    "<div style='position:relative'>&nbsp;</div>" +
                    "</td>" +
                    "</tr>";
                addMinutes(d, opt('slotMinutes'));
                slotCnt++;
            }
            s +=
                "</tbody>" +
                "</table>";
            slotTable = $(s).appendTo(slotContainer);

            slotBind(slotTable.find('td'));
        }

        /* Build Day Table
		-----------------------------------------------------------------------*/

        function buildDayTable() {
            var html = buildDayTableHTML();

            if(dayTable) {
                dayTable.remove();
            }
            dayTable = $(html).appendTo(element);

            dayHead = dayTable.find('thead');
            dayHeadCells = dayHead.find('th').slice(1, -1); // exclude gutter
            dayBody = dayTable.find('tbody');
            dayBodyCells = dayBody.find('td').slice(0, -1); // exclude gutter
            dayBodyCellInners = dayBodyCells.find('> div');
            dayBodyCellContentInners = dayBodyCells.find('.fc-day-content > div');

            dayBodyFirstCell = dayBodyCells.eq(0);
            dayBodyFirstCellStretcher = dayBodyCellInners.eq(0);

            markFirstLast(dayHead.add(dayHead.find('tr')));
            markFirstLast(dayBody.add(dayBody.find('tr')));

            // TODO: now that we rebuild the cells every time, we should call dayRender
        }

        function buildDayTableHTML() {
            var html =
                "<table style='width:100%' class='fc-agenda-days fc-border-separate' cellspacing='0'>" +
                buildDayTableHeadHTML() +
                buildDayTableBodyHTML() +
                "</table>";

            return html;
        }

        function buildDayTableHeadHTML() {
            var headerClass = tm + "-widget-header";
            var date;
            var html = '';
            var weekText;
            var col;

            html +=
                "<thead>" +
                "<tr>";

            if(showWeekNumbers) {
                date = cellToDate(0, 0);
                weekText = formatDate(date, weekNumberFormat);
                if(rtl) {
                    weekText += weekNumberTitle;
                } else {
                    weekText = weekNumberTitle + weekText;
                }
                html +=
                    "<th class='fc-agenda-axis fc-week-number " + headerClass + "'>" +
                    htmlEscape(weekText) +
                    "</th>";
            } else {
                html += "<th class='fc-agenda-axis " + headerClass + "'>&nbsp;</th>";
            }

            for(col = 0; col < colCnt; col++) {
                date = cellToDate(0, col);
                html +=
                    "<th class='fc-" + dayIDs[date.getDay()] + " fc-col" + col + ' ' + headerClass + "'>" +
                    htmlEscape(formatDate(date, colFormat)) +
                    "</th>";
            }

            html +=
                "<th class='fc-agenda-gutter " + headerClass + "'>&nbsp;</th>" +
                "</tr>" +
                "</thead>";

            return html;
        }

        function buildDayTableBodyHTML() {
            var headerClass = tm + "-widget-header"; // TODO: make these when updateOptions() called
            var contentClass = tm + "-widget-content";
            var date;
            var today = clearTime(new Date());
            var col;
            var cellsHTML;
            var cellHTML;
            var classNames;
            var html = '';

            html +=
                "<tbody>" +
                "<tr>" +
                "<th class='fc-agenda-axis " + headerClass + "'>&nbsp;</th>";

            cellsHTML = '';

            for(col = 0; col < colCnt; col++) {

                date = cellToDate(0, col);

                classNames = [
                    'fc-col' + col,
                    'fc-' + dayIDs[date.getDay()],
                    contentClass
                ];
                if(+date == +today) {
                    classNames.push(
                        tm + '-state-highlight',
                        'fc-today'
                    );
                } else if(date < today) {
                    classNames.push('fc-past');
                } else {
                    classNames.push('fc-future');
                }

                cellHTML =
                    "<td class='" + classNames.join(' ') + "'>" +
                    "<div>" +
                    "<div class='fc-day-content'>" +
                    "<div style='position:relative'>&nbsp;</div>" +
                    "</div>" +
                    "</div>" +
                    "</td>";

                cellsHTML += cellHTML;
            }

            html += cellsHTML;
            html +=
                "<td class='fc-agenda-gutter " + contentClass + "'>&nbsp;</td>" +
                "</tr>" +
                "</tbody>";

            return html;
        }

        // TODO: data-date on the cells

        /* Dimensions
		-----------------------------------------------------------------------*/

        function setHeight(height) {
            if(height === undefined) {
                height = viewHeight;
            }
            viewHeight = height;
            slotTopCache = {};

            var headHeight = dayBody.position().top;
            var allDayHeight = slotScroller.position().top; // including divider
            var bodyHeight = Math.min( // total body height, including borders
                height - headHeight, // when scrollbars
                slotTable.height() + allDayHeight + 1 // when no scrollbars. +1 for bottom border
            );

            dayBodyFirstCellStretcher
                .height(bodyHeight - vsides(dayBodyFirstCell));

            slotLayer.css('top', headHeight);

            slotScroller.height(bodyHeight - allDayHeight - 1);

            // the stylesheet guarantees that the first row has no border.
            // this allows .height() to work well cross-browser.
            slotHeight = slotTable.find('tr:first').height() + 1; // +1 for bottom border

            snapRatio = opt('slotMinutes') / snapMinutes;
            snapHeight = slotHeight / snapRatio;
        }

        function setWidth(width) {
            viewWidth = width;
            colPositions.clear();
            colContentPositions.clear();

            var axisFirstCells = dayHead.find('th:first');
            if(allDayTable) {
                axisFirstCells = axisFirstCells.add(allDayTable.find('th:first'));
            }
            axisFirstCells = axisFirstCells.add(slotTable.find('th:first'));

            axisWidth = 0;
            setOuterWidth(
                axisFirstCells
                    .width('')
                    .each(function(i, _cell) {
                        axisWidth = Math.max(axisWidth, $(_cell).outerWidth());
                    }),
                axisWidth
            );

            var gutterCells = dayTable.find('.fc-agenda-gutter');
            if(allDayTable) {
                gutterCells = gutterCells.add(allDayTable.find('th.fc-agenda-gutter'));
            }

            var slotTableWidth = slotScroller[0].clientWidth; // needs to be done after axisWidth (for IE7)

            gutterWidth = slotScroller.width() - slotTableWidth;
            if(gutterWidth) {
                setOuterWidth(gutterCells, gutterWidth);
                gutterCells
                    .show()
                    .prev()
                    .removeClass('fc-last');
            } else {
                gutterCells
                    .hide()
                    .prev()
                    .addClass('fc-last');
            }

            colWidth = Math.floor((slotTableWidth - axisWidth) / colCnt);
            setOuterWidth(dayHeadCells.slice(0, -1), colWidth);
        }

        /* Scrolling
		-----------------------------------------------------------------------*/

        function resetScroll() {
            var d0 = zeroDate();
            var scrollDate = cloneDate(d0);
            scrollDate.setHours(opt('firstHour'));
            var top = timePosition(d0, scrollDate) + 1; // +1 for the border
            function scroll() {
                slotScroller.scrollTop(top);
            }
            scroll();
            setTimeout(scroll, 0); // overrides any previous scroll state made by the browser
        }

        function afterRender() { // after the view has been freshly rendered and sized
            resetScroll();
        }

        /* Slot/Day clicking and binding
		-----------------------------------------------------------------------*/

        function dayBind(cells) {
            cells.click(slotClick)
                .mousedown(daySelectionMousedown);
        }

        function slotBind(cells) {
            cells.click(slotClick)
                .mousedown(slotSelectionMousedown);
        }

        function slotClick(ev) {
            if(!opt('selectable')) { // if selectable, SelectionManager will worry about dayClick
                var col = Math.min(colCnt - 1, Math.floor((ev.pageX - dayTable.offset().left - axisWidth) / colWidth));
                var date = cellToDate(0, col);
                var rowMatch = this.parentNode.className.match(/fc-slot(\d+)/); // TODO: maybe use data
                if(rowMatch) {
                    var mins = parseInt(rowMatch[1]) * opt('slotMinutes');
                    var hours = Math.floor(mins / 60);
                    date.setHours(hours);
                    date.setMinutes(mins % 60 + minMinute);
                    trigger('dayClick', dayBodyCells[col], date, false, ev);
                } else {
                    trigger('dayClick', dayBodyCells[col], date, true, ev);
                }
            }
        }

        /* Semi-transparent Overlay Helpers
		-----------------------------------------------------*/
        // TODO: should be consolidated with BasicView's methods

        function renderDayOverlay(overlayStart, overlayEnd, refreshCoordinateGrid) { // overlayEnd is exclusive

            if(refreshCoordinateGrid) {
                coordinateGrid.build();
            }

            var segments = rangeToSegments(overlayStart, overlayEnd);

            for(var i = 0; i < segments.length; i++) {
                var segment = segments[i];
                dayBind(
                    renderCellOverlay(
                        segment.row,
                        segment.leftCol,
                        segment.row,
                        segment.rightCol
                    )
                );
            }
        }

        function renderCellOverlay(row0, col0, row1, col1) { // only for all-day?
            var rect = coordinateGrid.rect(row0, col0, row1, col1, slotLayer);
            return renderOverlay(rect, slotLayer);
        }

        function renderSlotOverlay(overlayStart, overlayEnd) {
            for(var i = 0; i < colCnt; i++) {
                var dayStart = cellToDate(0, i);
                var dayEnd = addDays(cloneDate(dayStart), 1);
                var stretchStart = new Date(Math.max(dayStart, overlayStart));
                var stretchEnd = new Date(Math.min(dayEnd, overlayEnd));
                if(stretchStart < stretchEnd) {
                    var rect = coordinateGrid.rect(0, i, 0, i, slotContainer); // only use it for horizontal coords
                    var top = timePosition(dayStart, stretchStart);
                    var bottom = timePosition(dayStart, stretchEnd);
                    rect.top = top;
                    rect.height = bottom - top;
                    slotBind(
                        renderOverlay(rect, slotContainer)
                    );
                }
            }
        }

        /* Coordinate Utilities
		-----------------------------------------------------------------------------*/

        coordinateGrid = new CoordinateGrid(function(rows, cols) {
            var e, n, p;
            dayHeadCells.each(function(i, _e) {
                e = $(_e);
                n = e.offset().left;
                if(i) {
                    p[1] = n;
                }
                p = [n];
                cols[i] = p;
            });
            p[1] = n + e.outerWidth();
            if(opt('allDaySlot')) {
                e = allDayRow;
                n = e.offset().top;
                rows[0] = [n, n + e.outerHeight()];
            }
            var slotTableTop = slotContainer.offset().top;
            var slotScrollerTop = slotScroller.offset().top;
            var slotScrollerBottom = slotScrollerTop + slotScroller.outerHeight();

            function constrain(n) {
                return Math.max(slotScrollerTop, Math.min(slotScrollerBottom, n));
            }
            for(var i = 0; i < slotCnt * snapRatio; i++) { // adapt slot count to increased/decreased selection slot count
                rows.push([
                    constrain(slotTableTop + snapHeight * i),
                    constrain(slotTableTop + snapHeight * (i + 1))
                ]);
            }
        });

        hoverListener = new HoverListener(coordinateGrid);

        colPositions = new HorizontalPositionCache(function(col) {
            return dayBodyCellInners.eq(col);
        });

        colContentPositions = new HorizontalPositionCache(function(col) {
            return dayBodyCellContentInners.eq(col);
        });

        function colLeft(col) {
            return colPositions.left(col);
        }

        function colContentLeft(col) {
            return colContentPositions.left(col);
        }

        function colRight(col) {
            return colPositions.right(col);
        }

        function colContentRight(col) {
            return colContentPositions.right(col);
        }

        function getIsCellAllDay(cell) {
            return opt('allDaySlot') && !cell.row;
        }

        function realCellToDate(cell) { // ugh "real" ... but blame it on our abuse of the "cell" system
            var d = cellToDate(0, cell.col);
            var slotIndex = cell.row;
            if(opt('allDaySlot')) {
                slotIndex--;
            }
            if(slotIndex >= 0) {
                addMinutes(d, minMinute + slotIndex * snapMinutes);
            }
            return d;
        }

        // get the Y coordinate of the given time on the given day (both Date objects)
        function timePosition(day, time) { // both date objects. day holds 00:00 of current day
            day = cloneDate(day, true);
            if(time < addMinutes(cloneDate(day), minMinute)) {
                return 0;
            }
            if(time >= addMinutes(cloneDate(day), maxMinute)) {
                return slotTable.height();
            }
            var slotMinutes = opt('slotMinutes'),
                minutes = time.getHours() * 60 + time.getMinutes() - minMinute,
                slotI = Math.floor(minutes / slotMinutes),
                slotTop = slotTopCache[slotI];
            if(slotTop === undefined) {
                slotTop = slotTopCache[slotI] =
                    slotTable.find('tr').eq(slotI).find('td div')[0].offsetTop;
                // .eq() is faster than ":eq()" selector
                // [0].offsetTop is faster than .position().top (do we really need this optimization?)
                // a better optimization would be to cache all these divs
            }
            return Math.max(0, Math.round(
                slotTop - 1 + slotHeight * ((minutes % slotMinutes) / slotMinutes)
            ));
        }

        function getAllDayRow(index) {
            return allDayRow;
        }

        function defaultEventEnd(event) {
            var start = cloneDate(event.start);
            if(event.allDay) {
                return start;
            }
            return addMinutes(start, opt('defaultEventMinutes'));
        }

        /* Selection
		---------------------------------------------------------------------------------*/

        function defaultSelectionEnd(startDate, allDay) {
            if(allDay) {
                return cloneDate(startDate);
            }
            return addMinutes(cloneDate(startDate), opt('slotMinutes'));
        }

        function renderSelection(startDate, endDate, allDay) { // only for all-day
            if(allDay) {
                if(opt('allDaySlot')) {
                    renderDayOverlay(startDate, addDays(cloneDate(endDate), 1), true);
                }
            } else {
                renderSlotSelection(startDate, endDate);
            }
        }

        function renderSlotSelection(startDate, endDate) {
            var helperOption = opt('selectHelper');
            coordinateGrid.build();
            if(helperOption) {
                var col = dateToCell(startDate).col;
                if(col >= 0 && col < colCnt) { // only works when times are on same day
                    var rect = coordinateGrid.rect(0, col, 0, col, slotContainer); // only for horizontal coords
                    var top = timePosition(startDate, startDate);
                    var bottom = timePosition(startDate, endDate);
                    if(bottom > top) { // protect against selections that are entirely before or after visible range
                        rect.top = top;
                        rect.height = bottom - top;
                        rect.left += 2;
                        rect.width -= 5;
                        if($.isFunction(helperOption)) {
                            var helperRes = helperOption(startDate, endDate);
                            if(helperRes) {
                                rect.position = 'absolute';
                                selectionHelper = $(helperRes)
                                    .css(rect)
                                    .appendTo(slotContainer);
                            }
                        } else {
                            rect.isStart = true; // conside rect a "seg" now
                            rect.isEnd = true; //
                            selectionHelper = $(slotSegHtml({
                                    title: '',
                                    start: startDate,
                                    end: endDate,
                                    className: ['fc-select-helper'],
                                    editable: false
                                },
                                rect
                            ));
                            selectionHelper.css('opacity', opt('dragOpacity'));
                        }
                        if(selectionHelper) {
                            slotBind(selectionHelper);
                            slotContainer.append(selectionHelper);
                            setOuterWidth(selectionHelper, rect.width, true); // needs to be after appended
                            setOuterHeight(selectionHelper, rect.height, true);
                        }
                    }
                }
            } else {
                renderSlotOverlay(startDate, endDate);
            }
        }

        function clearSelection() {
            clearOverlays();
            if(selectionHelper) {
                selectionHelper.remove();
                selectionHelper = null;
            }
        }

        function slotSelectionMousedown(ev) {
            if(ev.which == 1 && opt('selectable')) { // ev.which==1 means left mouse button
                unselect(ev);
                var dates;
                hoverListener.start(function(cell, origCell) {
                    clearSelection();
                    if(cell && cell.col == origCell.col && !getIsCellAllDay(cell)) {
                        var d1 = realCellToDate(origCell);
                        var d2 = realCellToDate(cell);
                        dates = [
                            d1,
                            addMinutes(cloneDate(d1), snapMinutes), // calculate minutes depending on selection slot minutes
                            d2,
                            addMinutes(cloneDate(d2), snapMinutes)
                        ].sort(dateCompare);
                        renderSlotSelection(dates[0], dates[3]);
                    } else {
                        dates = null;
                    }
                }, ev);
                $(document).one('mouseup', function(ev) {
                    hoverListener.stop();
                    if(dates) {
                        if(+dates[0] == +dates[1]) {
                            reportDayClick(dates[0], false, ev);
                        }
                        reportSelection(dates[0], dates[3], false, ev);
                    }
                });
            }
        }

        function reportDayClick(date, allDay, ev) {
            trigger('dayClick', dayBodyCells[dateToCell(date).col], date, allDay, ev);
        }

        /* External Dragging
		--------------------------------------------------------------------------------*/

        function dragStart(_dragElement, ev, ui) {
            hoverListener.start(function(cell) {
                clearOverlays();
                if(cell) {
                    if(getIsCellAllDay(cell)) {
                        renderCellOverlay(cell.row, cell.col, cell.row, cell.col);
                    } else {
                        var d1 = realCellToDate(cell);
                        var d2 = addMinutes(cloneDate(d1), opt('defaultEventMinutes'));
                        renderSlotOverlay(d1, d2);
                    }
                }
            }, ev);
        }

        function dragStop(_dragElement, ev, ui) {
            var cell = hoverListener.stop();
            clearOverlays();
            if(cell) {
                trigger('drop', _dragElement, realCellToDate(cell), getIsCellAllDay(cell), ev, ui);
            }
        }

    }

    ;;

    function AgendaEventRenderer() {
        var t = this;

        // exports
        t.renderEvents = renderEvents;
        t.clearEvents = clearEvents;
        t.slotSegHtml = slotSegHtml;

        // imports
        DayEventRenderer.call(t);
        var opt = t.opt;
        var trigger = t.trigger;
        var isEventDraggable = t.isEventDraggable;
        var isEventResizable = t.isEventResizable;
        var eventEnd = t.eventEnd;
        var eventElementHandlers = t.eventElementHandlers;
        var setHeight = t.setHeight;
        var getDaySegmentContainer = t.getDaySegmentContainer;
        var getSlotSegmentContainer = t.getSlotSegmentContainer;
        var getHoverListener = t.getHoverListener;
        var getMaxMinute = t.getMaxMinute;
        var getMinMinute = t.getMinMinute;
        var timePosition = t.timePosition;
        var getIsCellAllDay = t.getIsCellAllDay;
        var colContentLeft = t.colContentLeft;
        var colContentRight = t.colContentRight;
        var cellToDate = t.cellToDate;
        var getColCnt = t.getColCnt;
        var getColWidth = t.getColWidth;
        var getSnapHeight = t.getSnapHeight;
        var getSnapMinutes = t.getSnapMinutes;
        var getSlotContainer = t.getSlotContainer;
        var reportEventElement = t.reportEventElement;
        var showEvents = t.showEvents;
        var hideEvents = t.hideEvents;
        var eventDrop = t.eventDrop;
        var eventResize = t.eventResize;
        var renderDayOverlay = t.renderDayOverlay;
        var clearOverlays = t.clearOverlays;
        var renderDayEvents = t.renderDayEvents;
        var calendar = t.calendar;
        var formatDate = calendar.formatDate;
        var formatDates = calendar.formatDates;

        // overrides
        t.draggableDayEvent = draggableDayEvent;

        /* Rendering
		----------------------------------------------------------------------------*/

        function renderEvents(events, modifiedEventId) {
            var i, len = events.length,
                dayEvents = [],
                slotEvents = [];
            for(i = 0; i < len; i++) {
                if(events[i].allDay) {
                    dayEvents.push(events[i]);
                } else {
                    slotEvents.push(events[i]);
                }
            }

            if(opt('allDaySlot')) {
                renderDayEvents(dayEvents, modifiedEventId);
                setHeight(); // no params means set to viewHeight
            }

            renderSlotSegs(compileSlotSegs(slotEvents), modifiedEventId);
        }

        function clearEvents() {
            getDaySegmentContainer().empty();
            getSlotSegmentContainer().empty();
        }

        function compileSlotSegs(events) {
            var colCnt = getColCnt(),
                minMinute = getMinMinute(),
                maxMinute = getMaxMinute(),
                d,
                visEventEnds = $.map(events, slotEventEnd),
                i,
                j, seg,
                colSegs,
                segs = [];

            for(i = 0; i < colCnt; i++) {

                d = cellToDate(0, i);
                addMinutes(d, minMinute);

                colSegs = sliceSegs(
                    events,
                    visEventEnds,
                    d,
                    addMinutes(cloneDate(d), maxMinute - minMinute)
                );

                colSegs = placeSlotSegs(colSegs); // returns a new order

                for(j = 0; j < colSegs.length; j++) {
                    seg = colSegs[j];
                    seg.col = i;
                    segs.push(seg);
                }
            }

            return segs;
        }

        function sliceSegs(events, visEventEnds, start, end) {
            var segs = [],
                i, len = events.length,
                event,
                eventStart, eventEnd,
                segStart, segEnd,
                isStart, isEnd;
            for(i = 0; i < len; i++) {
                event = events[i];
                eventStart = event.start;
                eventEnd = visEventEnds[i];
                if(eventEnd > start && eventStart < end) {
                    if(eventStart < start) {
                        segStart = cloneDate(start);
                        isStart = false;
                    } else {
                        segStart = eventStart;
                        isStart = true;
                    }
                    if(eventEnd > end) {
                        segEnd = cloneDate(end);
                        isEnd = false;
                    } else {
                        segEnd = eventEnd;
                        isEnd = true;
                    }
                    segs.push({
                        event: event,
                        start: segStart,
                        end: segEnd,
                        isStart: isStart,
                        isEnd: isEnd
                    });
                }
            }
            return segs.sort(compareSlotSegs);
        }

        function slotEventEnd(event) {
            if(event.end) {
                return cloneDate(event.end);
            } else {
                return addMinutes(cloneDate(event.start), opt('defaultEventMinutes'));
            }
        }

        // renders events in the 'time slots' at the bottom
        // TODO: when we refactor this, when user returns `false` eventRender, don't have empty space
        // TODO: refactor will include using pixels to detect collisions instead of dates (handy for seg cmp)

        function renderSlotSegs(segs, modifiedEventId) {

            var i, segCnt = segs.length,
                seg,
                event,
                top,
                bottom,
                columnLeft,
                columnRight,
                columnWidth,
                width,
                left,
                right,
                html = '',
                eventElements,
                eventElement,
                triggerRes,
                titleElement,
                height,
                slotSegmentContainer = getSlotSegmentContainer(),
                isRTL = opt('isRTL');

            // calculate position/dimensions, create html
            for(i = 0; i < segCnt; i++) {
                seg = segs[i];
                event = seg.event;
                top = timePosition(seg.start, seg.start);
                bottom = timePosition(seg.start, seg.end);
                columnLeft = colContentLeft(seg.col);
                columnRight = colContentRight(seg.col);
                columnWidth = columnRight - columnLeft;

                // shave off space on right near scrollbars (2.5%)
                // TODO: move this to CSS somehow
                columnRight -= columnWidth * .025;
                columnWidth = columnRight - columnLeft;

                width = columnWidth * (seg.forwardCoord - seg.backwardCoord);

                if(opt('slotEventOverlap')) {
                    // double the width while making sure resize handle is visible
                    // (assumed to be 20px wide)
                    width = Math.max(
                        (width - (20 / 2)) * 2,
                        width // narrow columns will want to make the segment smaller than
                        // the natural width. don't allow it
                    );
                }

                if(isRTL) {
                    right = columnRight - seg.backwardCoord * columnWidth;
                    left = right - width;
                } else {
                    left = columnLeft + seg.backwardCoord * columnWidth;
                    right = left + width;
                }

                // make sure horizontal coordinates are in bounds
                left = Math.max(left, columnLeft);
                right = Math.min(right, columnRight);
                width = right - left;

                seg.top = top;
                seg.left = left;
                seg.outerWidth = width;
                seg.outerHeight = bottom - top;
                html += slotSegHtml(event, seg);
            }

            slotSegmentContainer[0].innerHTML = html; // faster than html()
            eventElements = slotSegmentContainer.children();

            // retrieve elements, run through eventRender callback, bind event handlers
            for(i = 0; i < segCnt; i++) {
                seg = segs[i];
                event = seg.event;
                eventElement = $(eventElements[i]); // faster than eq()
                triggerRes = trigger('eventRender', event, event, eventElement);
                if(triggerRes === false) {
                    eventElement.remove();
                } else {
                    if(triggerRes && triggerRes !== true) {
                        eventElement.remove();
                        eventElement = $(triggerRes)
                            .css({
                                position: 'absolute',
                                top: seg.top,
                                left: seg.left
                            })
                            .appendTo(slotSegmentContainer);
                    }
                    seg.element = eventElement;
                    if(event._id === modifiedEventId) {
                        bindSlotSeg(event, eventElement, seg);
                    } else {
                        eventElement[0]._fci = i; // for lazySegBind
                    }
                    reportEventElement(event, eventElement);
                }
            }

            lazySegBind(slotSegmentContainer, segs, bindSlotSeg);

            // record event sides and title positions
            for(i = 0; i < segCnt; i++) {
                seg = segs[i];
                if(eventElement = seg.element) {
                    seg.vsides = vsides(eventElement, true);
                    seg.hsides = hsides(eventElement, true);
                    titleElement = eventElement.find('.fc-event-title');
                    if(titleElement.length) {
                        seg.contentTop = titleElement[0].offsetTop;
                    }
                }
            }

            // set all positions/dimensions at once
            for(i = 0; i < segCnt; i++) {
                seg = segs[i];
                if(eventElement = seg.element) {
                    eventElement[0].style.width = Math.max(0, seg.outerWidth - seg.hsides) + 'px';
                    height = Math.max(0, seg.outerHeight - seg.vsides);
                    eventElement[0].style.height = height + 'px';
                    event = seg.event;
                    if(seg.contentTop !== undefined && height - seg.contentTop < 10) {
                        // not enough room for title, put it in the time (TODO: maybe make both display:inline instead)
                        eventElement.find('div.fc-event-time')
                            .text(formatDate(event.start, opt('timeFormat')) + ' - ' + event.title);
                        eventElement.find('div.fc-event-title')
                            .remove();
                    }
                    trigger('eventAfterRender', event, event, eventElement);
                }
            }

        }

        function slotSegHtml(event, seg) {
            var html = "<";
            var url = event.url;
            var skinCss = getSkinCss(event, opt);
            var classes = ['fc-event', 'fc-event-vert'];
            if(isEventDraggable(event)) {
                classes.push('fc-event-draggable');
            }
            if(seg.isStart) {
                classes.push('fc-event-start');
            }
            if(seg.isEnd) {
                classes.push('fc-event-end');
            }
            classes = classes.concat(event.className);
            if(event.source) {
                classes = classes.concat(event.source.className || []);
            }
            if(url) {
                html += "a href='" + htmlEscape(event.url) + "'";
            } else {
                html += "div";
            }
            html +=
                " class='" + classes.join(' ') + "'" +
                " style=" +
                "'" +
                "position:absolute;" +
                "top:" + seg.top + "px;" +
                "left:" + seg.left + "px;" +
                skinCss +
                "'" +
                ">" +
                "<div class='fc-event-inner'>" +
                "<div class='fc-event-time'>" +
                htmlEscape(formatDates(event.start, event.end, opt('timeFormat'))) +
                "</div>" +
                "<div class='fc-event-title'>" +
                htmlEscape(event.title || '') +
                "</div>" +
                "</div>" +
                "<div class='fc-event-bg'></div>";
            if(seg.isEnd && isEventResizable(event)) {
                html +=
                    "<div class='ui-resizable-handle ui-resizable-s'>=</div>";
            }
            html +=
                "</" + (url ? "a" : "div") + ">";
            return html;
        }

        function bindSlotSeg(event, eventElement, seg) {
            var timeElement = eventElement.find('div.fc-event-time');
            if(isEventDraggable(event)) {
                draggableSlotEvent(event, eventElement, timeElement);
            }
            if(seg.isEnd && isEventResizable(event)) {
                resizableSlotEvent(event, eventElement, timeElement);
            }
            eventElementHandlers(event, eventElement);
        }

        /* Dragging
		-----------------------------------------------------------------------------------*/

        // when event starts out FULL-DAY
        // overrides DayEventRenderer's version because it needs to account for dragging elements
        // to and from the slot area.

        function draggableDayEvent(event, eventElement, seg) {
            var isStart = seg.isStart;
            var origWidth;
            var revert;
            var allDay = true;
            var dayDelta;
            var hoverListener = getHoverListener();
            var colWidth = getColWidth();
            var snapHeight = getSnapHeight();
            var snapMinutes = getSnapMinutes();
            var minMinute = getMinMinute();
            eventElement.draggable({
                opacity: opt('dragOpacity', 'month'), // use whatever the month view was using
                revertDuration: opt('dragRevertDuration'),
                start: function(ev, ui) {
                    trigger('eventDragStart', eventElement, event, ev, ui);
                    hideEvents(event, eventElement);
                    origWidth = eventElement.width();
                    hoverListener.start(function(cell, origCell) {
                        clearOverlays();
                        if(cell) {
                            revert = false;
                            var origDate = cellToDate(0, origCell.col);
                            var date = cellToDate(0, cell.col);
                            dayDelta = dayDiff(date, origDate);
                            if(!cell.row) {
                                // on full-days
                                renderDayOverlay(
                                    addDays(cloneDate(event.start), dayDelta),
                                    addDays(exclEndDay(event), dayDelta)
                                );
                                resetElement();
                            } else {
                                // mouse is over bottom slots
                                if(isStart) {
                                    if(allDay) {
                                        // convert event to temporary slot-event
                                        eventElement.width(colWidth - 10); // don't use entire width
                                        setOuterHeight(
                                            eventElement,
                                            snapHeight * Math.round(
                                            (event.end ? ((event.end - event.start) / MINUTE_MS) : opt('defaultEventMinutes')) /
                                            snapMinutes
                                            )
                                        );
                                        eventElement.draggable('option', 'grid', [colWidth, 1]);
                                        allDay = false;
                                    }
                                } else {
                                    revert = true;
                                }
                            }
                            revert = revert || (allDay && !dayDelta);
                        } else {
                            resetElement();
                            revert = true;
                        }
                        eventElement.draggable('option', 'revert', revert);
                    }, ev, 'drag');
                },
                stop: function(ev, ui) {
                    hoverListener.stop();
                    clearOverlays();
                    trigger('eventDragStop', eventElement, event, ev, ui);
                    if(revert) {
                        // hasn't moved or is out of bounds (draggable has already reverted)
                        resetElement();
                        eventElement.css('filter', ''); // clear IE opacity side-effects
                        showEvents(event, eventElement);
                    } else {
                        // changed!
                        var minuteDelta = 0;
                        if(!allDay) {
                            minuteDelta = Math.round((eventElement.offset().top - getSlotContainer().offset().top) / snapHeight) *
                                snapMinutes +
                                minMinute -
                                (event.start.getHours() * 60 + event.start.getMinutes());
                        }
                        eventDrop(this, event, dayDelta, minuteDelta, allDay, ev, ui);
                    }
                }
            });

            function resetElement() {
                if(!allDay) {
                    eventElement
                        .width(origWidth)
                        .height('')
                        .draggable('option', 'grid', null);
                    allDay = true;
                }
            }
        }

        // when event starts out IN TIMESLOTS

        function draggableSlotEvent(event, eventElement, timeElement) {
            var coordinateGrid = t.getCoordinateGrid();
            var colCnt = getColCnt();
            var colWidth = getColWidth();
            var snapHeight = getSnapHeight();
            var snapMinutes = getSnapMinutes();

            // states
            var origPosition; // original position of the element, not the mouse
            var origCell;
            var isInBounds, prevIsInBounds;
            var isAllDay, prevIsAllDay;
            var colDelta, prevColDelta;
            var dayDelta; // derived from colDelta
            var minuteDelta, prevMinuteDelta;

            eventElement.draggable({
                scroll: false,
                grid: [colWidth, snapHeight],
                axis: colCnt == 1 ? 'y' : false,
                opacity: opt('dragOpacity'),
                revertDuration: opt('dragRevertDuration'),
                start: function(ev, ui) {

                    trigger('eventDragStart', eventElement, event, ev, ui);
                    hideEvents(event, eventElement);

                    coordinateGrid.build();

                    // initialize states
                    origPosition = eventElement.position();
                    origCell = coordinateGrid.cell(ev.pageX, ev.pageY);
                    isInBounds = prevIsInBounds = true;
                    isAllDay = prevIsAllDay = getIsCellAllDay(origCell);
                    colDelta = prevColDelta = 0;
                    dayDelta = 0;
                    minuteDelta = prevMinuteDelta = 0;

                },
                drag: function(ev, ui) {

                    // NOTE: this `cell` value is only useful for determining in-bounds and all-day.
                    // Bad for anything else due to the discrepancy between the mouse position and the
                    // element position while snapping. (problem revealed in PR #55)
                    //
                    // PS- the problem exists for draggableDayEvent() when dragging an all-day event to a slot event.
                    // We should overhaul the dragging system and stop relying on jQuery UI.
                    var cell = coordinateGrid.cell(ev.pageX, ev.pageY);

                    // update states
                    isInBounds = !!cell;
                    if(isInBounds) {
                        isAllDay = getIsCellAllDay(cell);

                        // calculate column delta
                        colDelta = Math.round((ui.position.left - origPosition.left) / colWidth);
                        if(colDelta != prevColDelta) {
                            // calculate the day delta based off of the original clicked column and the column delta
                            var origDate = cellToDate(0, origCell.col);
                            var col = origCell.col + colDelta;
                            col = Math.max(0, col);
                            col = Math.min(colCnt - 1, col);
                            var date = cellToDate(0, col);
                            dayDelta = dayDiff(date, origDate);
                        }

                        // calculate minute delta (only if over slots)
                        if(!isAllDay) {
                            minuteDelta = Math.round((ui.position.top - origPosition.top) / snapHeight) * snapMinutes;
                        }
                    }

                    // any state changes?
                    if(
                        isInBounds != prevIsInBounds ||
                        isAllDay != prevIsAllDay ||
                        colDelta != prevColDelta ||
                        minuteDelta != prevMinuteDelta
                    ) {

                        updateUI();

                        // update previous states for next time
                        prevIsInBounds = isInBounds;
                        prevIsAllDay = isAllDay;
                        prevColDelta = colDelta;
                        prevMinuteDelta = minuteDelta;
                    }

                    // if out-of-bounds, revert when done, and vice versa.
                    eventElement.draggable('option', 'revert', !isInBounds);

                },
                stop: function(ev, ui) {

                    clearOverlays();
                    trigger('eventDragStop', eventElement, event, ev, ui);

                    if(isInBounds && (isAllDay || dayDelta || minuteDelta)) { // changed!
                        eventDrop(this, event, dayDelta, isAllDay ? 0 : minuteDelta, isAllDay, ev, ui);
                    } else { // either no change or out-of-bounds (draggable has already reverted)

                        // reset states for next time, and for updateUI()
                        isInBounds = true;
                        isAllDay = false;
                        colDelta = 0;
                        dayDelta = 0;
                        minuteDelta = 0;

                        updateUI();
                        eventElement.css('filter', ''); // clear IE opacity side-effects

                        // sometimes fast drags make event revert to wrong position, so reset.
                        // also, if we dragged the element out of the area because of snapping,
                        // but the *mouse* is still in bounds, we need to reset the position.
                        eventElement.css(origPosition);

                        showEvents(event, eventElement);
                    }
                }
            });

            function updateUI() {
                clearOverlays();
                if(isInBounds) {
                    if(isAllDay) {
                        timeElement.hide();
                        eventElement.draggable('option', 'grid', null); // disable grid snapping
                        renderDayOverlay(
                            addDays(cloneDate(event.start), dayDelta),
                            addDays(exclEndDay(event), dayDelta)
                        );
                    } else {
                        updateTimeText(minuteDelta);
                        timeElement.css('display', ''); // show() was causing display=inline
                        eventElement.draggable('option', 'grid', [colWidth, snapHeight]); // re-enable grid snapping
                    }
                }
            }

            function updateTimeText(minuteDelta) {
                var newStart = addMinutes(cloneDate(event.start), minuteDelta);
                var newEnd;
                if(event.end) {
                    newEnd = addMinutes(cloneDate(event.end), minuteDelta);
                }
                timeElement.text(formatDates(newStart, newEnd, opt('timeFormat')));
            }

        }

        /* Resizing
		--------------------------------------------------------------------------------------*/

        function resizableSlotEvent(event, eventElement, timeElement) {
            var snapDelta, prevSnapDelta;
            var snapHeight = getSnapHeight();
            var snapMinutes = getSnapMinutes();
            eventElement.resizable({
                handles: {
                    s: '.ui-resizable-handle'
                },
                grid: snapHeight,
                start: function(ev, ui) {
                    snapDelta = prevSnapDelta = 0;
                    hideEvents(event, eventElement);
                    trigger('eventResizeStart', this, event, ev, ui);
                },
                resize: function(ev, ui) {
                    // don't rely on ui.size.height, doesn't take grid into account
                    snapDelta = Math.round((Math.max(snapHeight, eventElement.height()) - ui.originalSize.height) / snapHeight);
                    if(snapDelta != prevSnapDelta) {
                        timeElement.text(
                            formatDates(
                                event.start,
                                (!snapDelta && !event.end) ? null : // no change, so don't display time range
                                    addMinutes(eventEnd(event), snapMinutes * snapDelta),
                                opt('timeFormat')
                            )
                        );
                        prevSnapDelta = snapDelta;
                    }
                },
                stop: function(ev, ui) {
                    trigger('eventResizeStop', this, event, ev, ui);
                    if(snapDelta) {
                        eventResize(this, event, 0, snapMinutes * snapDelta, ev, ui);
                    } else {
                        showEvents(event, eventElement);
                        // BUG: if event was really short, need to put title back in span
                    }
                }
            });
        }

    }

    /* Agenda Event Segment Utilities
	-----------------------------------------------------------------------------*/

    // Sets the seg.backwardCoord and seg.forwardCoord on each segment and returns a new
    // list in the order they should be placed into the DOM (an implicit z-index).
    function placeSlotSegs(segs) {
        var levels = buildSlotSegLevels(segs);
        var level0 = levels[0];
        var i;

        computeForwardSlotSegs(levels);

        if(level0) {

            for(i = 0; i < level0.length; i++) {
                computeSlotSegPressures(level0[i]);
            }

            for(i = 0; i < level0.length; i++) {
                computeSlotSegCoords(level0[i], 0, 0);
            }
        }

        return flattenSlotSegLevels(levels);
    }

    // Builds an array of segments "levels". The first level will be the leftmost tier of segments
    // if the calendar is left-to-right, or the rightmost if the calendar is right-to-left.
    function buildSlotSegLevels(segs) {
        var levels = [];
        var i, seg;
        var j;

        for(i = 0; i < segs.length; i++) {
            seg = segs[i];

            // go through all the levels and stop on the first level where there are no collisions
            for(j = 0; j < levels.length; j++) {
                if(!computeSlotSegCollisions(seg, levels[j]).length) {
                    break;
                }
            }

            (levels[j] || (levels[j] = [])).push(seg);
        }

        return levels;
    }

    // For every segment, figure out the other segments that are in subsequent
    // levels that also occupy the same vertical space. Accumulate in seg.forwardSegs
    function computeForwardSlotSegs(levels) {
        var i, level;
        var j, seg;
        var k;

        for(i = 0; i < levels.length; i++) {
            level = levels[i];

            for(j = 0; j < level.length; j++) {
                seg = level[j];

                seg.forwardSegs = [];
                for(k = i + 1; k < levels.length; k++) {
                    computeSlotSegCollisions(seg, levels[k], seg.forwardSegs);
                }
            }
        }
    }

    // Figure out which path forward (via seg.forwardSegs) results in the longest path until
    // the furthest edge is reached. The number of segments in this path will be seg.forwardPressure
    function computeSlotSegPressures(seg) {
        var forwardSegs = seg.forwardSegs;
        var forwardPressure = 0;
        var i, forwardSeg;

        if(seg.forwardPressure === undefined) { // not already computed

            for(i = 0; i < forwardSegs.length; i++) {
                forwardSeg = forwardSegs[i];

                // figure out the child's maximum forward path
                computeSlotSegPressures(forwardSeg);

                // either use the existing maximum, or use the child's forward pressure
                // plus one (for the forwardSeg itself)
                forwardPressure = Math.max(
                    forwardPressure,
                    1 + forwardSeg.forwardPressure
                );
            }

            seg.forwardPressure = forwardPressure;
        }
    }

    // Calculate seg.forwardCoord and seg.backwardCoord for the segment, where both values range
    // from 0 to 1. If the calendar is left-to-right, the seg.backwardCoord maps to "left" and
    // seg.forwardCoord maps to "right" (via percentage). Vice-versa if the calendar is right-to-left.
    //
    // The segment might be part of a "series", which means consecutive segments with the same pressure
    // who's width is unknown until an edge has been hit. `seriesBackwardPressure` is the number of
    // segments behind this one in the current series, and `seriesBackwardCoord` is the starting
    // coordinate of the first segment in the series.
    function computeSlotSegCoords(seg, seriesBackwardPressure, seriesBackwardCoord) {
        var forwardSegs = seg.forwardSegs;
        var i;

        if(seg.forwardCoord === undefined) { // not already computed

            if(!forwardSegs.length) {

                // if there are no forward segments, this segment should butt up against the edge
                seg.forwardCoord = 1;
            } else {

                // sort highest pressure first
                forwardSegs.sort(compareForwardSlotSegs);

                // this segment's forwardCoord will be calculated from the backwardCoord of the
                // highest-pressure forward segment.
                computeSlotSegCoords(forwardSegs[0], seriesBackwardPressure + 1, seriesBackwardCoord);
                seg.forwardCoord = forwardSegs[0].backwardCoord;
            }

            // calculate the backwardCoord from the forwardCoord. consider the series
            seg.backwardCoord = seg.forwardCoord -
                (seg.forwardCoord - seriesBackwardCoord) / // available width for series
                (seriesBackwardPressure + 1); // # of segments in the series

            // use this segment's coordinates to computed the coordinates of the less-pressurized
            // forward segments
            for(i = 0; i < forwardSegs.length; i++) {
                computeSlotSegCoords(forwardSegs[i], 0, seg.forwardCoord);
            }
        }
    }

    // Outputs a flat array of segments, from lowest to highest level
    function flattenSlotSegLevels(levels) {
        var segs = [];
        var i, level;
        var j;

        for(i = 0; i < levels.length; i++) {
            level = levels[i];

            for(j = 0; j < level.length; j++) {
                segs.push(level[j]);
            }
        }

        return segs;
    }

    // Find all the segments in `otherSegs` that vertically collide with `seg`.
    // Append into an optionally-supplied `results` array and return.
    function computeSlotSegCollisions(seg, otherSegs, results) {
        results = results || [];

        for(var i = 0; i < otherSegs.length; i++) {
            if(isSlotSegCollision(seg, otherSegs[i])) {
                results.push(otherSegs[i]);
            }
        }

        return results;
    }

    // Do these segments occupy the same vertical space?
    function isSlotSegCollision(seg1, seg2) {
        return seg1.end > seg2.start && seg1.start < seg2.end;
    }

    // A cmp function for determining which forward segment to rely on more when computing coordinates.
    function compareForwardSlotSegs(seg1, seg2) {
        // put higher-pressure first
        return seg2.forwardPressure - seg1.forwardPressure ||
            // put segments that are closer to initial edge first (and favor ones with no coords yet)
            (seg1.backwardCoord || 0) - (seg2.backwardCoord || 0) ||
            // do normal sorting...
            compareSlotSegs(seg1, seg2);
    }

    // A cmp function for determining which segment should be closer to the initial edge
    // (the left edge on a left-to-right calendar).
    function compareSlotSegs(seg1, seg2) {
        return seg1.start - seg2.start || // earlier start time goes first
            (seg2.end - seg2.start) - (seg1.end - seg1.start) || // tie? longer-duration goes first
            (seg1.event.title || '').localeCompare(seg2.event.title); // tie? alphabetically by title
    }

    ;;

    function View(element, calendar, viewName) {
        var t = this;

        // exports
        t.element = element;
        t.calendar = calendar;
        t.name = viewName;
        t.opt = opt;
        t.trigger = trigger;
        t.isEventDraggable = isEventDraggable;
        t.isEventResizable = isEventResizable;
        t.setEventData = setEventData;
        t.clearEventData = clearEventData;
        t.eventEnd = eventEnd;
        t.reportEventElement = reportEventElement;
        t.triggerEventDestroy = triggerEventDestroy;
        t.eventElementHandlers = eventElementHandlers;
        t.showEvents = showEvents;
        t.hideEvents = hideEvents;
        t.eventDrop = eventDrop;
        t.eventResize = eventResize;
        // t.title
        // t.start, t.end
        // t.visStart, t.visEnd

        // imports
        var defaultEventEnd = t.defaultEventEnd;
        var normalizeEvent = calendar.normalizeEvent; // in EventManager
        var reportEventChange = calendar.reportEventChange;

        // locals
        var eventsByID = {}; // eventID mapped to array of events (there can be multiple b/c of repeating events)
        var eventElementsByID = {}; // eventID mapped to array of jQuery elements
        var eventElementCouples = []; // array of objects, { event, element } // TODO: unify with segment system
        var options = calendar.options;

        function opt(name, viewNameOverride) {
            var v = options[name];
            if($.isPlainObject(v)) {
                return smartProperty(v, viewNameOverride || viewName);
            }
            return v;
        }

        function trigger(name, thisObj) {
            return calendar.trigger.apply(
                calendar, [name, thisObj || t].concat(Array.prototype.slice.call(arguments, 2), [t])
            );
        }

        /* Event Editable Boolean Calculations
		------------------------------------------------------------------------------*/

        function isEventDraggable(event) {
            var source = event.source || {};
            return firstDefined(
                event.startEditable,
                source.startEditable,
                opt('eventStartEditable'),
                event.editable,
                source.editable,
                opt('editable')
                ) &&
                !opt('disableDragging'); // deprecated
        }

        function isEventResizable(event) { // but also need to make sure the seg.isEnd == true
            var source = event.source || {};
            return firstDefined(
                event.durationEditable,
                source.durationEditable,
                opt('eventDurationEditable'),
                event.editable,
                source.editable,
                opt('editable')
                ) &&
                !opt('disableResizing'); // deprecated
        }

        /* Event Data
		------------------------------------------------------------------------------*/

        function setEventData(events) { // events are already normalized at this point
            eventsByID = {};
            var i, len = events.length,
                event;
            for(i = 0; i < len; i++) {
                event = events[i];
                if(eventsByID[event._id]) {
                    eventsByID[event._id].push(event);
                } else {
                    eventsByID[event._id] = [event];
                }
            }
        }

        function clearEventData() {
            eventsByID = {};
            eventElementsByID = {};
            eventElementCouples = [];
        }

        // returns a Date object for an event's end
        function eventEnd(event) {
            return event.end ? cloneDate(event.end) : defaultEventEnd(event);
        }

        /* Event Elements
		------------------------------------------------------------------------------*/

        // report when view creates an element for an event
        function reportEventElement(event, element) {
            eventElementCouples.push({
                event: event,
                element: element
            });
            if(eventElementsByID[event._id]) {
                eventElementsByID[event._id].push(element);
            } else {
                eventElementsByID[event._id] = [element];
            }
        }

        function triggerEventDestroy() {
            $.each(eventElementCouples, function(i, couple) {
                t.trigger('eventDestroy', couple.event, couple.event, couple.element);
            });
        }

        // attaches eventClick, eventMouseover, eventMouseout
        function eventElementHandlers(event, eventElement) {
            eventElement
                .click(function(ev) {
                    if(!eventElement.hasClass('ui-draggable-dragging') &&
                        !eventElement.hasClass('ui-resizable-resizing')) {
                        return trigger('eventClick', this, event, ev);
                    }
                })
                .hover(
                    function(ev) {
                        trigger('eventMouseover', this, event, ev);
                    },
                    function(ev) {
                        trigger('eventMouseout', this, event, ev);
                    }
                );
            // TODO: don't fire eventMouseover/eventMouseout *while* dragging is occuring (on subject element)
            // TODO: same for resizing
        }

        function showEvents(event, exceptElement) {
            eachEventElement(event, exceptElement, 'show');
        }

        function hideEvents(event, exceptElement) {
            eachEventElement(event, exceptElement, 'hide');
        }

        function eachEventElement(event, exceptElement, funcName) {
            // NOTE: there may be multiple events per ID (repeating events)
            // and multiple segments per event
            var elements = eventElementsByID[event._id],
                i, len = elements.length;
            for(i = 0; i < len; i++) {
                if(!exceptElement || elements[i][0] != exceptElement[0]) {
                    elements[i][funcName]();
                }
            }
        }

        /* Event Modification Reporting
		---------------------------------------------------------------------------------*/

        function eventDrop(e, event, dayDelta, minuteDelta, allDay, ev, ui) {
            var oldAllDay = event.allDay;
            var eventId = event._id;
            moveEvents(eventsByID[eventId], dayDelta, minuteDelta, allDay);
            trigger(
                'eventDrop',
                e,
                event,
                dayDelta,
                minuteDelta,
                allDay,
                function() {
                    // TODO: investigate cases where this inverse technique might not work
                    moveEvents(eventsByID[eventId], -dayDelta, -minuteDelta, oldAllDay);
                    reportEventChange(eventId);
                },
                ev,
                ui
            );
            reportEventChange(eventId);
        }

        function eventResize(e, event, dayDelta, minuteDelta, ev, ui) {
            var eventId = event._id;
            elongateEvents(eventsByID[eventId], dayDelta, minuteDelta);
            trigger(
                'eventResize',
                e,
                event,
                dayDelta,
                minuteDelta,
                function() {
                    // TODO: investigate cases where this inverse technique might not work
                    elongateEvents(eventsByID[eventId], -dayDelta, -minuteDelta);
                    reportEventChange(eventId);
                },
                ev,
                ui
            );
            reportEventChange(eventId);
        }

        /* Event Modification Math
		---------------------------------------------------------------------------------*/

        function moveEvents(events, dayDelta, minuteDelta, allDay) {
            minuteDelta = minuteDelta || 0;
            for(var e, len = events.length, i = 0; i < len; i++) {
                e = events[i];
                if(allDay !== undefined) {
                    e.allDay = allDay;
                }
                addMinutes(addDays(e.start, dayDelta, true), minuteDelta);
                if(e.end) {
                    e.end = addMinutes(addDays(e.end, dayDelta, true), minuteDelta);
                }
                normalizeEvent(e, options);
            }
        }

        function elongateEvents(events, dayDelta, minuteDelta) {
            minuteDelta = minuteDelta || 0;
            for(var e, len = events.length, i = 0; i < len; i++) {
                e = events[i];
                e.end = addMinutes(addDays(eventEnd(e), dayDelta, true), minuteDelta);
                normalizeEvent(e, options);
            }
        }

        // ====================================================================================================
        // Utilities for day "cells"
        // ====================================================================================================
        // The "basic" views are completely made up of day cells.
        // The "agenda" views have day cells at the top "all day" slot.
        // This was the obvious common place to put these utilities, but they should be abstracted out into
        // a more meaningful class (like DayEventRenderer).
        // ====================================================================================================

        // For determining how a given "cell" translates into a "date":
        //
        // 1. Convert the "cell" (row and column) into a "cell offset" (the # of the cell, cronologically from the first).
        //    Keep in mind that column indices are inverted with isRTL. This is taken into account.
        //
        // 2. Convert the "cell offset" to a "day offset" (the # of days since the first visible day in the view).
        //
        // 3. Convert the "day offset" into a "date" (a JavaScript Date object).
        //
        // The reverse transformation happens when transforming a date into a cell.

        // exports
        t.isHiddenDay = isHiddenDay;
        t.skipHiddenDays = skipHiddenDays;
        t.getCellsPerWeek = getCellsPerWeek;
        t.dateToCell = dateToCell;
        t.dateToDayOffset = dateToDayOffset;
        t.dayOffsetToCellOffset = dayOffsetToCellOffset;
        t.cellOffsetToCell = cellOffsetToCell;
        t.cellToDate = cellToDate;
        t.cellToCellOffset = cellToCellOffset;
        t.cellOffsetToDayOffset = cellOffsetToDayOffset;
        t.dayOffsetToDate = dayOffsetToDate;
        t.rangeToSegments = rangeToSegments;

        // internals
        var hiddenDays = opt('hiddenDays') || []; // array of day-of-week indices that are hidden
        var isHiddenDayHash = []; // is the day-of-week hidden? (hash with day-of-week-index -> bool)
        var cellsPerWeek;
        var dayToCellMap = []; // hash from dayIndex -> cellIndex, for one week
        var cellToDayMap = []; // hash from cellIndex -> dayIndex, for one week
        var isRTL = opt('isRTL');

        // initialize important internal variables
        (function() {

            if(opt('weekends') === false) {
                hiddenDays.push(0, 6); // 0=sunday, 6=saturday
            }

            // Loop through a hypothetical week and determine which
            // days-of-week are hidden. Record in both hashes (one is the reverse of the other).
            for(var dayIndex = 0, cellIndex = 0; dayIndex < 7; dayIndex++) {
                dayToCellMap[dayIndex] = cellIndex;
                isHiddenDayHash[dayIndex] = $.inArray(dayIndex, hiddenDays) != -1;
                if(!isHiddenDayHash[dayIndex]) {
                    cellToDayMap[cellIndex] = dayIndex;
                    cellIndex++;
                }
            }

            cellsPerWeek = cellIndex;
            if(!cellsPerWeek) {
                throw 'invalid hiddenDays'; // all days were hidden? bad.
            }

        })();

        // Is the current day hidden?
        // `day` is a day-of-week index (0-6), or a Date object
        function isHiddenDay(day) {
            if(typeof day == 'object') {
                day = day.getDay();
            }
            return isHiddenDayHash[day];
        }

        function getCellsPerWeek() {
            return cellsPerWeek;
        }

        // Keep incrementing the current day until it is no longer a hidden day.
        // If the initial value of `date` is not a hidden day, don't do anything.
        // Pass `isExclusive` as `true` if you are dealing with an end date.
        // `inc` defaults to `1` (increment one day forward each time)
        function skipHiddenDays(date, inc, isExclusive) {
            inc = inc || 1;
            while(
                isHiddenDayHash[(date.getDay() + (isExclusive ? inc : 0) + 7) % 7]
                ) {
                addDays(date, inc);
            }
        }

        //
        // TRANSFORMATIONS: cell -> cell offset -> day offset -> date
        //

        // cell -> date (combines all transformations)
        // Possible arguments:
        // - row, col
        // - { row:#, col: # }
        function cellToDate() {
            var cellOffset = cellToCellOffset.apply(null, arguments);
            var dayOffset = cellOffsetToDayOffset(cellOffset);
            var date = dayOffsetToDate(dayOffset);
            return date;
        }

        // cell -> cell offset
        // Possible arguments:
        // - row, col
        // - { row:#, col:# }
        function cellToCellOffset(row, col) {
            var colCnt = t.getColCnt();

            // rtl variables. wish we could pre-populate these. but where?
            var dis = isRTL ? -1 : 1;
            var dit = isRTL ? colCnt - 1 : 0;

            if(typeof row == 'object') {
                col = row.col;
                row = row.row;
            }
            var cellOffset = row * colCnt + (col * dis + dit); // column, adjusted for RTL (dis & dit)

            return cellOffset;
        }

        // cell offset -> day offset
        function cellOffsetToDayOffset(cellOffset) {
            var day0 = t.visStart.getDay(); // first date's day of week
            cellOffset += dayToCellMap[day0]; // normlize cellOffset to beginning-of-week
            return Math.floor(cellOffset / cellsPerWeek) * 7 // # of days from full weeks
                +
                cellToDayMap[ // # of days from partial last week
                (cellOffset % cellsPerWeek + cellsPerWeek) % cellsPerWeek // crazy math to handle negative cellOffsets
                    ] -
                day0; // adjustment for beginning-of-week normalization
        }

        // day offset -> date (JavaScript Date object)
        function dayOffsetToDate(dayOffset) {
            var date = cloneDate(t.visStart);
            addDays(date, dayOffset);
            return date;
        }

        //
        // TRANSFORMATIONS: date -> day offset -> cell offset -> cell
        //

        // date -> cell (combines all transformations)
        function dateToCell(date) {
            var dayOffset = dateToDayOffset(date);
            var cellOffset = dayOffsetToCellOffset(dayOffset);
            var cell = cellOffsetToCell(cellOffset);
            return cell;
        }

        // date -> day offset
        function dateToDayOffset(date) {
            return dayDiff(date, t.visStart);
        }

        // day offset -> cell offset
        function dayOffsetToCellOffset(dayOffset) {
            var day0 = t.visStart.getDay(); // first date's day of week
            dayOffset += day0; // normalize dayOffset to beginning-of-week
            return Math.floor(dayOffset / 7) * cellsPerWeek // # of cells from full weeks
                +
                dayToCellMap[ // # of cells from partial last week
                (dayOffset % 7 + 7) % 7 // crazy math to handle negative dayOffsets
                    ] -
                dayToCellMap[day0]; // adjustment for beginning-of-week normalization
        }

        // cell offset -> cell (object with row & col keys)
        function cellOffsetToCell(cellOffset) {
            var colCnt = t.getColCnt();

            // rtl variables. wish we could pre-populate these. but where?
            var dis = isRTL ? -1 : 1;
            var dit = isRTL ? colCnt - 1 : 0;

            var row = Math.floor(cellOffset / colCnt);
            var col = ((cellOffset % colCnt + colCnt) % colCnt) * dis + dit; // column, adjusted for RTL (dis & dit)
            return {
                row: row,
                col: col
            };
        }

        //
        // Converts a date range into an array of segment objects.
        // "Segments" are horizontal stretches of time, sliced up by row.
        // A segment object has the following properties:
        // - row
        // - cols
        // - isStart
        // - isEnd
        //
        function rangeToSegments(startDate, endDate) {
            var rowCnt = t.getRowCnt();
            var colCnt = t.getColCnt();
            var segments = []; // array of segments to return

            // day offset for given date range
            var rangeDayOffsetStart = dateToDayOffset(startDate);
            var rangeDayOffsetEnd = dateToDayOffset(endDate); // exclusive

            // first and last cell offset for the given date range
            // "last" implies inclusivity
            var rangeCellOffsetFirst = dayOffsetToCellOffset(rangeDayOffsetStart);
            var rangeCellOffsetLast = dayOffsetToCellOffset(rangeDayOffsetEnd) - 1;

            // loop through all the rows in the view
            for(var row = 0; row < rowCnt; row++) {

                // first and last cell offset for the row
                var rowCellOffsetFirst = row * colCnt;
                var rowCellOffsetLast = rowCellOffsetFirst + colCnt - 1;

                // get the segment's cell offsets by constraining the range's cell offsets to the bounds of the row
                var segmentCellOffsetFirst = Math.max(rangeCellOffsetFirst, rowCellOffsetFirst);
                var segmentCellOffsetLast = Math.min(rangeCellOffsetLast, rowCellOffsetLast);

                // make sure segment's offsets are valid and in view
                if(segmentCellOffsetFirst <= segmentCellOffsetLast) {

                    // translate to cells
                    var segmentCellFirst = cellOffsetToCell(segmentCellOffsetFirst);
                    var segmentCellLast = cellOffsetToCell(segmentCellOffsetLast);

                    // view might be RTL, so order by leftmost column
                    var cols = [segmentCellFirst.col, segmentCellLast.col].sort();

                    // Determine if segment's first/last cell is the beginning/end of the date range.
                    // We need to compare "day offset" because "cell offsets" are often ambiguous and
                    // can translate to multiple days, and an edge case reveals itself when we the
                    // range's first cell is hidden (we don't want isStart to be true).
                    var isStart = cellOffsetToDayOffset(segmentCellOffsetFirst) == rangeDayOffsetStart;
                    var isEnd = cellOffsetToDayOffset(segmentCellOffsetLast) + 1 == rangeDayOffsetEnd; // +1 for comparing exclusively

                    segments.push({
                        row: row,
                        leftCol: cols[0],
                        rightCol: cols[1],
                        isStart: isStart,
                        isEnd: isEnd
                    });
                }
            }

            return segments;
        }

    }

    ;;

    function DayEventRenderer() {
        var t = this;

        // exports
        t.renderDayEvents = renderDayEvents;
        t.draggableDayEvent = draggableDayEvent; // made public so that subclasses can override
        t.resizableDayEvent = resizableDayEvent; // "

        // imports
        var opt = t.opt;
        var trigger = t.trigger;
        var isEventDraggable = t.isEventDraggable;
        var isEventResizable = t.isEventResizable;
        var eventEnd = t.eventEnd;
        var reportEventElement = t.reportEventElement;
        var eventElementHandlers = t.eventElementHandlers;
        var showEvents = t.showEvents;
        var hideEvents = t.hideEvents;
        var eventDrop = t.eventDrop;
        var eventResize = t.eventResize;
        var getRowCnt = t.getRowCnt;
        var getColCnt = t.getColCnt;
        var getColWidth = t.getColWidth;
        var allDayRow = t.allDayRow; // TODO: rename
        var colLeft = t.colLeft;
        var colRight = t.colRight;
        var colContentLeft = t.colContentLeft;
        var colContentRight = t.colContentRight;
        var dateToCell = t.dateToCell;
        var getDaySegmentContainer = t.getDaySegmentContainer;
        var formatDates = t.calendar.formatDates;
        var renderDayOverlay = t.renderDayOverlay;
        var clearOverlays = t.clearOverlays;
        var clearSelection = t.clearSelection;
        var getHoverListener = t.getHoverListener;
        var rangeToSegments = t.rangeToSegments;
        var cellToDate = t.cellToDate;
        var cellToCellOffset = t.cellToCellOffset;
        var cellOffsetToDayOffset = t.cellOffsetToDayOffset;
        var dateToDayOffset = t.dateToDayOffset;
        var dayOffsetToCellOffset = t.dayOffsetToCellOffset;

        // Render `events` onto the calendar, attach mouse event handlers, and call the `eventAfterRender` callback for each.
        // Mouse event will be lazily applied, except if the event has an ID of `modifiedEventId`.
        // Can only be called when the event container is empty (because it wipes out all innerHTML).
        function renderDayEvents(events, modifiedEventId) {

            // do the actual rendering. Receive the intermediate "segment" data structures.
            var segments = _renderDayEvents(
                events,
                false, // don't append event elements
                true // set the heights of the rows
            );

            // report the elements to the View, for general drag/resize utilities
            segmentElementEach(segments, function(segment, element) {
                reportEventElement(segment.event, element);
            });

            // attach mouse handlers
            attachHandlers(segments, modifiedEventId);

            // call `eventAfterRender` callback for each event
            segmentElementEach(segments, function(segment, element) {
                trigger('eventAfterRender', segment.event, segment.event, element);
            });
        }

        // Render an event on the calendar, but don't report them anywhere, and don't attach mouse handlers.
        // Append this event element to the event container, which might already be populated with events.
        // If an event's segment will have row equal to `adjustRow`, then explicitly set its top coordinate to `adjustTop`.
        // This hack is used to maintain continuity when user is manually resizing an event.
        // Returns an array of DOM elements for the event.
        function renderTempDayEvent(event, adjustRow, adjustTop) {

            // actually render the event. `true` for appending element to container.
            // Recieve the intermediate "segment" data structures.
            var segments = _renderDayEvents(
                [event],
                true, // append event elements
                false // don't set the heights of the rows
            );

            var elements = [];

            // Adjust certain elements' top coordinates
            segmentElementEach(segments, function(segment, element) {
                if(segment.row === adjustRow) {
                    element.css('top', adjustTop);
                }
                elements.push(element[0]); // accumulate DOM nodes
            });

            return elements;
        }

        // Render events onto the calendar. Only responsible for the VISUAL aspect.
        // Not responsible for attaching handlers or calling callbacks.
        // Set `doAppend` to `true` for rendering elements without clearing the existing container.
        // Set `doRowHeights` to allow setting the height of each row, to compensate for vertical event overflow.
        function _renderDayEvents(events, doAppend, doRowHeights) {

            // where the DOM nodes will eventually end up
            var finalContainer = getDaySegmentContainer();

            // the container where the initial HTML will be rendered.
            // If `doAppend`==true, uses a temporary container.
            var renderContainer = doAppend ? $("<div/>") : finalContainer;

            var segments = buildSegments(events);
            var html;
            var elements;

            // calculate the desired `left` and `width` properties on each segment object
            calculateHorizontals(segments);

            // build the HTML string. relies on `left` property
            html = buildHTML(segments);

            // render the HTML. innerHTML is considerably faster than jQuery's .html()
            renderContainer[0].innerHTML = html;

            // retrieve the individual elements
            elements = renderContainer.children();

            // if we were appending, and thus using a temporary container,
            // re-attach elements to the real container.
            if(doAppend) {
                finalContainer.append(elements);
            }

            // assigns each element to `segment.event`, after filtering them through user callbacks
            resolveElements(segments, elements);

            // Calculate the left and right padding+margin for each element.
            // We need this for setting each element's desired outer width, because of the W3C box model.
            // It's important we do this in a separate pass from acually setting the width on the DOM elements
            // because alternating reading/writing dimensions causes reflow for every iteration.
            segmentElementEach(segments, function(segment, element) {
                segment.hsides = hsides(element, true); // include margins = `true`
            });

            // Set the width of each element
            segmentElementEach(segments, function(segment, element) {
                element.width(
                    Math.max(0, segment.outerWidth - segment.hsides)
                );
            });

            // Grab each element's outerHeight (setVerticals uses this).
            // To get an accurate reading, it's important to have each element's width explicitly set already.
            segmentElementEach(segments, function(segment, element) {
                segment.outerHeight = element.outerHeight(true); // include margins = `true`
            });

            // Set the top coordinate on each element (requires segment.outerHeight)
            setVerticals(segments, doRowHeights);

            return segments;
        }

        // Generate an array of "segments" for all events.
        function buildSegments(events) {
            var segments = [];
            for(var i = 0; i < events.length; i++) {
                var eventSegments = buildSegmentsForEvent(events[i]);
                segments.push.apply(segments, eventSegments); // append an array to an array
            }
            return segments;
        }

        // Generate an array of segments for a single event.
        // A "segment" is the same data structure that View.rangeToSegments produces,
        // with the addition of the `event` property being set to reference the original event.
        function buildSegmentsForEvent(event) {
            var startDate = event.start;
            var endDate = exclEndDay(event);
            var segments = rangeToSegments(startDate, endDate);
            for(var i = 0; i < segments.length; i++) {
                segments[i].event = event;
            }
            return segments;
        }

        // Sets the `left` and `outerWidth` property of each segment.
        // These values are the desired dimensions for the eventual DOM elements.
        function calculateHorizontals(segments) {
            var isRTL = opt('isRTL');
            for(var i = 0; i < segments.length; i++) {
                var segment = segments[i];

                // Determine functions used for calulating the elements left/right coordinates,
                // depending on whether the view is RTL or not.
                // NOTE:
                // colLeft/colRight returns the coordinate butting up the edge of the cell.
                // colContentLeft/colContentRight is indented a little bit from the edge.
                var leftFunc = (isRTL ? segment.isEnd : segment.isStart) ? colContentLeft : colLeft;
                var rightFunc = (isRTL ? segment.isStart : segment.isEnd) ? colContentRight : colRight;

                var left = leftFunc(segment.leftCol);
                var right = rightFunc(segment.rightCol);
                segment.left = left;
                segment.outerWidth = right - left;
            }
        }

        // Build a concatenated HTML string for an array of segments
        function buildHTML(segments) {
            var html = '';
            for(var i = 0; i < segments.length; i++) {
                html += buildHTMLForSegment(segments[i]);
            }
            return html;
        }

        // Build an HTML string for a single segment.
        // Relies on the following properties:
        // - `segment.event` (from `buildSegmentsForEvent`)
        // - `segment.left` (from `calculateHorizontals`)
        function buildHTMLForSegment(segment) {
            var html = '';
            var isRTL = opt('isRTL');
            var event = segment.event;
            var url = event.url;

            // generate the list of CSS classNames
            var classNames = ['fc-event', 'fc-event-hori'];
            if(isEventDraggable(event)) {
                classNames.push('fc-event-draggable');
            }
            if(segment.isStart) {
                classNames.push('fc-event-start');
            }
            if(segment.isEnd) {
                classNames.push('fc-event-end');
            }
            // use the event's configured classNames
            // guaranteed to be an array via `normalizeEvent`
            classNames = classNames.concat(event.className);
            if(event.source) {
                // use the event's source's classNames, if specified
                classNames = classNames.concat(event.source.className || []);
            }

            // generate a semicolon delimited CSS string for any of the "skin" properties
            // of the event object (`backgroundColor`, `borderColor` and such)
            var skinCss = getSkinCss(event, opt);

            if(url) {
                html += "<a href='" + htmlEscape(url) + "'";
            } else {
                html += "<div";
            }
            html +=
                " class='" + classNames.join(' ') + "'" +
                " style=" +
                "'" +
                "position:absolute;" +
                "left:" + segment.left + "px;" +
                skinCss +
                "'" +
                ">" +
                "<div class='fc-event-inner'>";
            if(!event.allDay && segment.isStart) {
                html +=
                    "<span class='fc-event-time'>" +
                    htmlEscape(
                        formatDates(event.start, event.end, opt('timeFormat'))
                    ) +
                    "</span>";
            }
            html +=
                "<span class='fc-event-title'>" +
                htmlEscape(event.title || '') +
                "</span>" +
                "</div>";
            if(segment.isEnd && isEventResizable(event)) {
                html +=
                    "<div class='ui-resizable-handle ui-resizable-" + (isRTL ? 'w' : 'e') + "'>" +
                    "&nbsp;&nbsp;&nbsp;" + // makes hit area a lot better for IE6/7
                    "</div>";
            }
            html += "</" + (url ? "a" : "div") + ">";

            // TODO:
            // When these elements are initially rendered, they will be briefly visibile on the screen,
            // even though their widths/heights are not set.
            // SOLUTION: initially set them as visibility:hidden ?

            return html;
        }

        // Associate each segment (an object) with an element (a jQuery object),
        // by setting each `segment.element`.
        // Run each element through the `eventRender` filter, which allows developers to
        // modify an existing element, supply a new one, or cancel rendering.
        function resolveElements(segments, elements) {
            for(var i = 0; i < segments.length; i++) {
                var segment = segments[i];
                var event = segment.event;
                var element = elements.eq(i);

                // call the trigger with the original element
                var triggerRes = trigger('eventRender', event, event, element);

                if(triggerRes === false) {
                    // if `false`, remove the event from the DOM and don't assign it to `segment.event`
                    element.remove();
                } else {
                    if(triggerRes && triggerRes !== true) {
                        // the trigger returned a new element, but not `true` (which means keep the existing element)

                        // re-assign the important CSS dimension properties that were already assigned in `buildHTMLForSegment`
                        triggerRes = $(triggerRes)
                            .css({
                                position: 'absolute',
                                left: segment.left
                            });

                        element.replaceWith(triggerRes);
                        element = triggerRes;
                    }

                    segment.element = element;
                }
            }
        }

        /* Top-coordinate Methods
		-------------------------------------------------------------------------------------------------*/

        // Sets the "top" CSS property for each element.
        // If `doRowHeights` is `true`, also sets each row's first cell to an explicit height,
        // so that if elements vertically overflow, the cell expands vertically to compensate.
        function setVerticals(segments, doRowHeights) {
            var rowContentHeights = calculateVerticals(segments); // also sets segment.top
            var rowContentElements = getRowContentElements(); // returns 1 inner div per row
            var rowContentTops = [];

            // Set each row's height by setting height of first inner div
            if(doRowHeights) {
                for(var i = 0; i < rowContentElements.length; i++) {
                    rowContentElements[i].height(rowContentHeights[i]);
                }
            }

            // Get each row's top, relative to the views's origin.
            // Important to do this after setting each row's height.
            for(var i = 0; i < rowContentElements.length; i++) {
                rowContentTops.push(
                    rowContentElements[i].position().top
                );
            }

            // Set each segment element's CSS "top" property.
            // Each segment object has a "top" property, which is relative to the row's top, but...
            segmentElementEach(segments, function(segment, element) {
                element.css(
                    'top',
                    rowContentTops[segment.row] + segment.top // ...now, relative to views's origin
                );
            });
        }

        // Calculate the "top" coordinate for each segment, relative to the "top" of the row.
        // Also, return an array that contains the "content" height for each row
        // (the height displaced by the vertically stacked events in the row).
        // Requires segments to have their `outerHeight` property already set.
        function calculateVerticals(segments) {
            var rowCnt = getRowCnt();
            var colCnt = getColCnt();
            var rowContentHeights = []; // content height for each row
            var segmentRows = buildSegmentRows(segments); // an array of segment arrays, one for each row

            for(var rowI = 0; rowI < rowCnt; rowI++) {
                var segmentRow = segmentRows[rowI];

                // an array of running total heights for each column.
                // initialize with all zeros.
                var colHeights = [];
                for(var colI = 0; colI < colCnt; colI++) {
                    colHeights.push(0);
                }

                // loop through every segment
                for(var segmentI = 0; segmentI < segmentRow.length; segmentI++) {
                    var segment = segmentRow[segmentI];

                    // find the segment's top coordinate by looking at the max height
                    // of all the columns the segment will be in.
                    segment.top = arrayMax(
                        colHeights.slice(
                            segment.leftCol,
                            segment.rightCol + 1 // make exclusive for slice
                        )
                    );

                    // adjust the columns to account for the segment's height
                    for(var colI = segment.leftCol; colI <= segment.rightCol; colI++) {
                        colHeights[colI] = segment.top + segment.outerHeight;
                    }
                }

                // the tallest column in the row should be the "content height"
                rowContentHeights.push(arrayMax(colHeights));
            }

            return rowContentHeights;
        }

        // Build an array of segment arrays, each representing the segments that will
        // be in a row of the grid, sorted by which event should be closest to the top.
        function buildSegmentRows(segments) {
            var rowCnt = getRowCnt();
            var segmentRows = [];
            var segmentI;
            var segment;
            var rowI;

            // group segments by row
            for(segmentI = 0; segmentI < segments.length; segmentI++) {
                segment = segments[segmentI];
                rowI = segment.row;
                if(segment.element) { // was rendered?
                    if(segmentRows[rowI]) {
                        // already other segments. append to array
                        segmentRows[rowI].push(segment);
                    } else {
                        // first segment in row. create new array
                        segmentRows[rowI] = [segment];
                    }
                }
            }

            // sort each row
            for(rowI = 0; rowI < rowCnt; rowI++) {
                segmentRows[rowI] = sortSegmentRow(
                    segmentRows[rowI] || [] // guarantee an array, even if no segments
                );
            }

            return segmentRows;
        }

        // Sort an array of segments according to which segment should appear closest to the top
        function sortSegmentRow(segments) {
            var sortedSegments = [];

            // build the subrow array
            var subrows = buildSegmentSubrows(segments);

            // flatten it
            for(var i = 0; i < subrows.length; i++) {
                sortedSegments.push.apply(sortedSegments, subrows[i]); // append an array to an array
            }

            return sortedSegments;
        }

        // Take an array of segments, which are all assumed to be in the same row,
        // and sort into subrows.
        function buildSegmentSubrows(segments) {

            // Give preference to elements with certain criteria, so they have
            // a chance to be closer to the top.
            segments.sort(compareDaySegments);

            var subrows = [];
            for(var i = 0; i < segments.length; i++) {
                var segment = segments[i];

                // loop through subrows, starting with the topmost, until the segment
                // doesn't collide with other segments.
                for(var j = 0; j < subrows.length; j++) {
                    if(!isDaySegmentCollision(segment, subrows[j])) {
                        break;
                    }
                }
                // `j` now holds the desired subrow index
                if(subrows[j]) {
                    subrows[j].push(segment);
                } else {
                    subrows[j] = [segment];
                }
            }

            return subrows;
        }

        // Return an array of jQuery objects for the placeholder content containers of each row.
        // The content containers don't actually contain anything, but their dimensions should match
        // the events that are overlaid on top.
        function getRowContentElements() {
            var i;
            var rowCnt = getRowCnt();
            var rowDivs = [];
            for(i = 0; i < rowCnt; i++) {
                rowDivs[i] = allDayRow(i)
                    .find('div.fc-day-content > div');
            }
            return rowDivs;
        }

        /* Mouse Handlers
		---------------------------------------------------------------------------------------------------*/
        // TODO: better documentation!

        function attachHandlers(segments, modifiedEventId) {
            var segmentContainer = getDaySegmentContainer();

            segmentElementEach(segments, function(segment, element, i) {
                var event = segment.event;
                if(event._id === modifiedEventId) {
                    bindDaySeg(event, element, segment);
                } else {
                    element[0]._fci = i; // for lazySegBind
                }
            });

            lazySegBind(segmentContainer, segments, bindDaySeg);
        }

        function bindDaySeg(event, eventElement, segment) {

            if(isEventDraggable(event)) {
                t.draggableDayEvent(event, eventElement, segment); // use `t` so subclasses can override
            }

            if(
                segment.isEnd && // only allow resizing on the final segment for an event
                isEventResizable(event)
            ) {
                t.resizableDayEvent(event, eventElement, segment); // use `t` so subclasses can override
            }

            // attach all other handlers.
            // needs to be after, because resizableDayEvent might stopImmediatePropagation on click
            eventElementHandlers(event, eventElement);
        }

        function draggableDayEvent(event, eventElement) {
            var hoverListener = getHoverListener();
            var dayDelta;
            eventElement.draggable({
                delay: 50,
                opacity: opt('dragOpacity'),
                revertDuration: opt('dragRevertDuration'),
                start: function(ev, ui) {
                    trigger('eventDragStart', eventElement, event, ev, ui);
                    hideEvents(event, eventElement);
                    hoverListener.start(function(cell, origCell, rowDelta, colDelta) {
                        eventElement.draggable('option', 'revert', !cell || !rowDelta && !colDelta);
                        clearOverlays();
                        if(cell) {
                            var origDate = cellToDate(origCell);
                            var date = cellToDate(cell);
                            dayDelta = dayDiff(date, origDate);
                            renderDayOverlay(
                                addDays(cloneDate(event.start), dayDelta),
                                addDays(exclEndDay(event), dayDelta)
                            );
                        } else {
                            dayDelta = 0;
                        }
                    }, ev, 'drag');
                },
                stop: function(ev, ui) {
                    hoverListener.stop();
                    clearOverlays();
                    trigger('eventDragStop', eventElement, event, ev, ui);
                    if(dayDelta) {
                        eventDrop(this, event, dayDelta, 0, event.allDay, ev, ui);
                    } else {
                        eventElement.css('filter', ''); // clear IE opacity side-effects
                        showEvents(event, eventElement);
                    }
                }
            });
        }

        function resizableDayEvent(event, element, segment) {
            var isRTL = opt('isRTL');
            var direction = isRTL ? 'w' : 'e';
            var handle = element.find('.ui-resizable-' + direction); // TODO: stop using this class because we aren't using jqui for this
            var isResizing = false;

            // TODO: look into using jquery-ui mouse widget for this stuff
            disableTextSelection(element); // prevent native <a> selection for IE
            element
                .mousedown(function(ev) { // prevent native <a> selection for others
                    ev.preventDefault();
                })
                .click(function(ev) {
                    if(isResizing) {
                        ev.preventDefault(); // prevent link from being visited (only method that worked in IE6)
                        ev.stopImmediatePropagation(); // prevent fullcalendar eventClick handler from being called
                        // (eventElementHandlers needs to be bound after resizableDayEvent)
                    }
                });

            handle.mousedown(function(ev) {
                if(ev.which != 1) {
                    return; // needs to be left mouse button
                }
                isResizing = true;
                var hoverListener = getHoverListener();
                var rowCnt = getRowCnt();
                var colCnt = getColCnt();
                var elementTop = element.css('top');
                var dayDelta;
                var helpers;
                var eventCopy = $.extend({}, event);
                var minCellOffset = dayOffsetToCellOffset(dateToDayOffset(event.start));
                clearSelection();
                $('body')
                    .css('cursor', direction + '-resize')
                    .one('mouseup', mouseup);
                trigger('eventResizeStart', this, event, ev);
                hoverListener.start(function(cell, origCell) {
                    if(cell) {

                        var origCellOffset = cellToCellOffset(origCell);
                        var cellOffset = cellToCellOffset(cell);

                        // don't let resizing move earlier than start date cell
                        cellOffset = Math.max(cellOffset, minCellOffset);

                        dayDelta =
                            cellOffsetToDayOffset(cellOffset) -
                            cellOffsetToDayOffset(origCellOffset);

                        if(dayDelta) {
                            eventCopy.end = addDays(eventEnd(event), dayDelta, true);
                            var oldHelpers = helpers;

                            helpers = renderTempDayEvent(eventCopy, segment.row, elementTop);
                            helpers = $(helpers); // turn array into a jQuery object

                            helpers.find('*').css('cursor', direction + '-resize');
                            if(oldHelpers) {
                                oldHelpers.remove();
                            }

                            hideEvents(event);
                        } else {
                            if(helpers) {
                                showEvents(event);
                                helpers.remove();
                                helpers = null;
                            }
                        }
                        clearOverlays();
                        renderDayOverlay( // coordinate grid already rebuilt with hoverListener.start()
                            event.start,
                            addDays(exclEndDay(event), dayDelta)
                            // TODO: instead of calling renderDayOverlay() with dates,
                            // call _renderDayOverlay (or whatever) with cell offsets.
                        );
                    }
                }, ev);

                function mouseup(ev) {
                    trigger('eventResizeStop', this, event, ev);
                    $('body').css('cursor', '');
                    hoverListener.stop();
                    clearOverlays();
                    if(dayDelta) {
                        eventResize(this, event, dayDelta, 0, ev);
                        // event redraw will clear helpers
                    }
                    // otherwise, the drag handler already restored the old events

                    setTimeout(function() { // make this happen after the element's click event
                        isResizing = false;
                    }, 0);
                }
            });
        }

    }

    /* Generalized Segment Utilities
	-------------------------------------------------------------------------------------------------*/

    function isDaySegmentCollision(segment, otherSegments) {
        for(var i = 0; i < otherSegments.length; i++) {
            var otherSegment = otherSegments[i];
            if(
                otherSegment.leftCol <= segment.rightCol &&
                otherSegment.rightCol >= segment.leftCol
            ) {
                return true;
            }
        }
        return false;
    }

    function segmentElementEach(segments, callback) { // TODO: use in AgendaView?
        for(var i = 0; i < segments.length; i++) {
            var segment = segments[i];
            var element = segment.element;
            if(element) {
                callback(segment, element, i);
            }
        }
    }

    // A cmp function for determining which segments should appear higher up
    function compareDaySegments(a, b) {
        return(b.rightCol - b.leftCol) - (a.rightCol - a.leftCol) || // put wider events first
            b.event.allDay - a.event.allDay || // if tie, put all-day events first (booleans cast to 0/1)
            a.event.start - b.event.start || // if a tie, sort by event start date
            (a.event.title || '').localeCompare(b.event.title) // if a tie, sort by event title
    }

    ;;

    //BUG: unselect needs to be triggered when events are dragged+dropped

    function SelectionManager() {
        var t = this;

        // exports
        t.select = select;
        t.unselect = unselect;
        t.reportSelection = reportSelection;
        t.daySelectionMousedown = daySelectionMousedown;

        // imports
        var opt = t.opt;
        var trigger = t.trigger;
        var defaultSelectionEnd = t.defaultSelectionEnd;
        var renderSelection = t.renderSelection;
        var clearSelection = t.clearSelection;

        // locals
        var selected = false;

        // unselectAuto
        if(opt('selectable') && opt('unselectAuto')) {
            $(document).mousedown(function(ev) {
                var ignore = opt('unselectCancel');
                if(ignore) {
                    if($(ev.target).parents(ignore).length) { // could be optimized to stop after first match
                        return;
                    }
                }
                unselect(ev);
            });
        }

        function select(startDate, endDate, allDay) {
            unselect();
            if(!endDate) {
                endDate = defaultSelectionEnd(startDate, allDay);
            }
            renderSelection(startDate, endDate, allDay);
            reportSelection(startDate, endDate, allDay);
        }

        function unselect(ev) {
            if(selected) {
                selected = false;
                clearSelection();
                trigger('unselect', null, ev);
            }
        }

        function reportSelection(startDate, endDate, allDay, ev) {
            selected = true;
            trigger('select', null, startDate, endDate, allDay, ev);
        }

        function daySelectionMousedown(ev) { // not really a generic manager method, oh well
            var cellToDate = t.cellToDate;
            var getIsCellAllDay = t.getIsCellAllDay;
            var hoverListener = t.getHoverListener();
            var reportDayClick = t.reportDayClick; // this is hacky and sort of weird
            if(ev.which == 1 && opt('selectable')) { // which==1 means left mouse button
                unselect(ev);
                var _mousedownElement = this;
                var dates;
                hoverListener.start(function(cell, origCell) { // TODO: maybe put cellToDate/getIsCellAllDay info in cell
                    clearSelection();
                    if(cell && getIsCellAllDay(cell)) {
                        dates = [cellToDate(origCell), cellToDate(cell)].sort(dateCompare);
                        renderSelection(dates[0], dates[1], true);
                    } else {
                        dates = null;
                    }
                }, ev);
                $(document).one('mouseup', function(ev) {
                    hoverListener.stop();
                    if(dates) {
                        if(+dates[0] == +dates[1]) {
                            reportDayClick(dates[0], true, ev);
                        }
                        reportSelection(dates[0], dates[1], true, ev);
                    }
                });
            }
        }

    }

    ;;

    function OverlayManager() {
        var t = this;

        // exports
        t.renderOverlay = renderOverlay;
        t.clearOverlays = clearOverlays;

        // locals
        var usedOverlays = [];
        var unusedOverlays = [];

        function renderOverlay(rect, parent) {
            var e = unusedOverlays.shift();
            if(!e) {
                e = $("<div class='fc-cell-overlay' style='position:absolute;z-index:3'/>");
            }
            if(e[0].parentNode != parent[0]) {
                e.appendTo(parent);
            }
            usedOverlays.push(e.css(rect).show());
            return e;
        }

        function clearOverlays() {
            var e;
            while(e = usedOverlays.shift()) {
                unusedOverlays.push(e.hide().unbind());
            }
        }

    }

    ;;

    function CoordinateGrid(buildFunc) {

        var t = this;
        var rows;
        var cols;

        t.build = function() {
            rows = [];
            cols = [];
            buildFunc(rows, cols);
        };

        t.cell = function(x, y) {
            var rowCnt = rows.length;
            var colCnt = cols.length;
            var i, r = -1,
                c = -1;
            for(i = 0; i < rowCnt; i++) {
                if(y >= rows[i][0] && y < rows[i][1]) {
                    r = i;
                    break;
                }
            }
            for(i = 0; i < colCnt; i++) {
                if(x >= cols[i][0] && x < cols[i][1]) {
                    c = i;
                    break;
                }
            }
            return(r >= 0 && c >= 0) ? {
                row: r,
                col: c
            } : null;
        };

        t.rect = function(row0, col0, row1, col1, originElement) { // row1,col1 is inclusive
            var origin = originElement.offset();
            return {
                top: rows[row0][0] - origin.top,
                left: cols[col0][0] - origin.left,
                width: cols[col1][1] - cols[col0][0],
                height: rows[row1][1] - rows[row0][0]
            };
        };

    }

    ;;

    function HoverListener(coordinateGrid) {

        var t = this;
        var bindType;
        var change;
        var firstCell;
        var cell;

        t.start = function(_change, ev, _bindType) {
            change = _change;
            firstCell = cell = null;
            coordinateGrid.build();
            mouse(ev);
            bindType = _bindType || 'mousemove';
            $(document).bind(bindType, mouse);
        };

        function mouse(ev) {
            _fixUIEvent(ev); // see below
            var newCell = coordinateGrid.cell(ev.pageX, ev.pageY);
            if(!newCell != !cell || newCell && (newCell.row != cell.row || newCell.col != cell.col)) {
                if(newCell) {
                    if(!firstCell) {
                        firstCell = newCell;
                    }
                    change(newCell, firstCell, newCell.row - firstCell.row, newCell.col - firstCell.col);
                } else {
                    change(newCell, firstCell);
                }
                cell = newCell;
            }
        }

        t.stop = function() {
            $(document).unbind(bindType, mouse);
            return cell;
        };

    }

    // this fix was only necessary for jQuery UI 1.8.16 (and jQuery 1.7 or 1.7.1)
    // upgrading to jQuery UI 1.8.17 (and using either jQuery 1.7 or 1.7.1) fixed the problem
    // but keep this in here for 1.8.16 users
    // and maybe remove it down the line

    function _fixUIEvent(event) { // for issue 1168
        if(event.pageX === undefined) {
            event.pageX = event.originalEvent.pageX;
            event.pageY = event.originalEvent.pageY;
        }
    };;

    function HorizontalPositionCache(getElement) {

        var t = this,
            elements = {},
            lefts = {},
            rights = {};

        function e(i) {
            return elements[i] = elements[i] || getElement(i);
        }

        t.left = function(i) {
            return lefts[i] = lefts[i] === undefined ? e(i).position().left : lefts[i];
        };

        t.right = function(i) {
            return rights[i] = rights[i] === undefined ? t.left(i) + e(i).width() : rights[i];
        };

        t.clear = function() {
            elements = {};
            lefts = {};
            rights = {};
        };

    }

    ;;

})(jQuery);